diff --git a/README.md b/README.md
index ba3ce4a..579a838 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@
    - Download the latest `bal-electrum-plugin-vX.X.X.zip` file
 
 2. **Install in Electrum**
-   - Open Electrum Bitcoin wallet
+   - Open Electrum Bitcoin wallet version **4.7.2 or later**
    - Go to **Tools → Plugins**
    - Click **Add**
    - Select the downloaded `.zip` file
@@ -57,7 +57,7 @@ Executor Broadcasts at Locktime → Transaction Confirmed → Heirs Receive Fund
 - The will-executor receives their fee directly in the transaction output
 - Fee is paid only when transaction is confirmed on the Bitcoin network
 - Executor is **financially incentivized** to broadcast and confirm the transaction
-- No separate payment needed - fee is part of the timelocked transaction
+- Fee is a **fixed amount only** (no percentage option)
 
 ---
 
@@ -70,7 +70,7 @@ bal-electrum-plugin/
 │   ├── bal.py                    # Main plugin logic and core functionality
 │   ├── bal_resources.py          # Resource management and asset handling
 │   ├── heirs.py                  # Heir management logic and validation
-│   ├── qt.py                     # Main Qt interface and GUI components
+│   ├── qt.py                     # Main Qt interface and GUI components (PyQt6)
 │   ├── util.py                   # General utility functions
 │   ├── wallet_util/
 │   │   ├── bal_wallet_utils.py   # ⚠️ Advanced wallet utilities for emergency fixes
@@ -119,14 +119,14 @@ bal-electrum-plugin/
 
 ### Will Executor System (willexecutors.py)
 - **Multiple executors**: Choose from available executors
-- **Incentive structure**: Executor receives fee **only when transaction confirms**
-- **Transaction includes fee**: Fee is part of the timelocked transaction output
+- **Fixed fee only**: Executor receives a fixed BTC amount (no percentage option)
+- **Fee included in transaction**: Fee is part of the timelocked transaction output
 - **Financial motivation**: Executor must broadcast to get paid
 - **Automatic transmission**: Transaction sent to executor after creation
 - **Blockchain monitoring**: Executor broadcasts at locktime expiration
 
 **Executor Fee Details**:
-- Fee is specified as percentage of transaction amount or fixed amount
+- Fee is specified as fixed BTC amount only
 - Fee is added to transaction outputs
 - Executor receives fee only when transaction confirms
 - No separate payment channel needed
@@ -134,12 +134,14 @@ bal-electrum-plugin/
 ### Advanced Wallet Utilities (wallet_util/)
 - **⚠️ Emergency tools only**: For fixing wallet database issues
 - **Purpose**: Handle compatibility across different Electrum walletdb versions
-- **Usage**: Advanced users only, not needed for normal operation
+- **Usage**: Advanced users only, requires manual installation
+- **Installation**: Copy files to Electrum's plugin directory and load Electrum's virtualenv
 - **Files**:
   - `bal_wallet_utils.py`: Core wallet database utilities
   - `bal_wallet_utils_qt.py`: Qt-specific wallet utilities
 
 ### Main Interface (qt.py)
+- **PyQt6 only**: Uses PyQt6 (not PyQt5)
 - **User-friendly wizards**: Step-by-step setup interface
 - **Real-time validation**: Immediate feedback on inputs
 - **Transaction preview**: Review before finalizing
@@ -172,7 +174,7 @@ Executor: "Alice Executor" (fee: 0.01 BTC fixed)
   - Heir 1: 0.4 BTC
   - Heir 2: 0.35 BTC
   - Heir 3: 0.25 BTC
-  - Executor fee: 0.01 BTC (1% of 1.0 BTC)
+  - Executor fee: 0.01 BTC (fixed amount)
   - Network fee: 0.001 BTC
 - Locktime: 1 year from creation
 - Sent to: Alice Executor's address
@@ -230,7 +232,7 @@ After installation, configure in Electrum:
    - **Default Locktime**: Set default locktime format (e.g., "365d")
    - **CheckAlive Mode**: Choose "interval" or "fixed_date"
    - **CheckAlive Value**: Set interval (e.g., "180d") or timestamp
-   - **Executor Fee**: Set percentage (e.g., 1) or fixed amount (e.g., 0.01)
+   - **Executor Fee**: Set fixed BTC amount (e.g., 0.01)
    - **Debug Mode**: Enable for troubleshooting
 
 ### Configuration File Location
@@ -247,7 +249,6 @@ After installation, configure in Electrum:
   "default_locktime": "365d",
   "checkalive_mode": "interval",
   "checkalive_value": "180d",
-  
   "executor_fee": 0.01,
   "debug": false
 }
@@ -258,10 +259,9 @@ After installation, configure in Electrum:
 ## 🛠️ Development
 
 ### Prerequisites
-- Electrum Bitcoin wallet (version 4.0.0 or later)
-- Python 3.7+
-- PyQt5
-- pytest
+- **Electrum Bitcoin wallet**: Version **4.7.2 or later** (not 4.0.0)
+- **Python**: 3.7+
+- **PyQt6**: Only PyQt6 is supported (not PyQt5)
 
 ### Setup Development Environment
 
@@ -276,10 +276,15 @@ zip -r bal-electrum-plugin-dev.zip bal_electrum_plugin/
 
 ### Important Notes on wallet_util/
 
-**These utilities are for emergency use only**:
+**These utilities require manual installation**:
 
 - **Purpose**: Fix wallet database compatibility issues across Electrum versions
 - **Usage**: Only when experiencing wallet corruption or version mismatches
+- **Installation Steps**:
+  1. Copy `wallet_util/` files to Electrum's plugin directory
+  2. Load Electrum's virtualenv
+  3. Restart Electrum
+  
 - **Risk**: Advanced operations that can affect wallet data
 - **Documentation**: Limited to inline code comments
 
@@ -298,27 +303,11 @@ zip -r bal-electrum-plugin-dev.zip bal_electrum_plugin/
 
 4. Re-zip and reinstall to test
 
-### Running Tests
+### Running the Plugin
 
-```bash
-# Install test dependencies
-pip install pytest
-
-# Run all tests
-pytest tests/
-
-# Run specific test
-pytest tests/test_heirs.py -v
-```
-
-### Code Style
-
-- Follow PEP 8 guidelines strictly
-- Use descriptive variable and function names
-- Add type hints for public functions
-- Write comprehensive docstrings
-- Keep functions focused and small (< 50 lines)
-- Document complex logic thoroughly
+The plugin uses Electrum's existing virtualenv. No additional dependencies needed beyond:
+- Electrum 4.7.2+
+- PyQt6
 
 ---
 
@@ -327,12 +316,17 @@ pytest tests/test_heirs.py -v
 ### Common Issues
 
 #### Plugin Not Showing in Electrum
-- ✅ Verify Electrum version is 4.0.0 or later
+- ✅ Verify Electrum version is **4.7.2 or later** (not 4.0.0)
 - ✅ Check zip contains `bal_electrum_plugin/` directory at root
 - ✅ Verify directory structure inside zip is correct
 - ✅ Restart Electrum completely after installation
 - ✅ Check Electrum logs: Help → Debug → Console
 
+#### PyQt6 Compatibility Issues
+- ✅ Ensure you're using PyQt6, not PyQt5
+- ✅ Verify Electrum 4.7.2+ uses PyQt6
+- ✅ Check import statements in plugin code
+
 #### Locktime Format Errors
 - ✅ Use valid formats: `180d`, `1y`, or Unix timestamp (e.g., `1735689600`)
 - ✅ Ensure locktime is in the future (after current time)
@@ -357,14 +351,20 @@ pytest tests/test_heirs.py -v
 - ✅ Verify all heirs have valid, unique addresses
 - ✅ Ensure locktime format is correct
 - ✅ Check executor is selected and available
-- ✅ Verify executor fee is properly configured
+- ✅ Verify executor fee is properly configured (fixed amount only)
 
 #### Executor Fee Issues
+- ✅ Fee is a fixed BTC amount only (no percentage option)
 - ✅ Fee is included in transaction output
 - ✅ Executor receives fee only when transaction confirms
-- ✅ No separate payment needed - fee is part of transaction
 - ✅ Transaction must be broadcast and confirmed for executor to get paid
 
+#### wallet_util/ Not Working
+- ✅ Copy files to Electrum's plugin directory
+- ✅ Load Electrum's virtualenv before using
+- ✅ Only use for emergency wallet fixes
+- ✅ Backup wallet before using wallet utilities
+
 ---
 
 ## 🤝 Contributing
@@ -373,11 +373,10 @@ We welcome contributions! Please follow these guidelines:
 
 1. **Fork the repository** on Gitea
 2. **Create feature branch**: `git checkout -b feature/your-feature`
-3. **Add tests** for new functionality
-4. **Follow PEP 8** style guide strictly
-5. **Write clear commit messages** following Conventional Commits
-6. **Update documentation** for new features
-7. **Open Pull Request** to `main` branch
+3. **Follow PEP 8** style guide strictly
+4. **Write clear commit messages** following Conventional Commits
+5. **Update documentation** for new features
+6. **Open Pull Request** to `main` branch
 
 ### Development Workflow
 
@@ -397,8 +396,7 @@ git checkout -b feature/your-feature-name
 # Make changes to bal_electrum_plugin/ files
 # ...
 
-# Test changes
-pytest tests/
+# Test in Electrum 4.7.2+ with PyQt6
 
 # Commit changes with clear message
 git add .
@@ -431,4 +429,6 @@ MIT License - see [LICENSE](LICENSE) for details.
 
 **🔒 Security**: Never share your seed phrase or private keys. This plugin only creates transactions, it doesn't store your keys.
 
-**💡 Note**: The executor fee is included in the transaction output. The executor is financially incentivized to broadcast the transaction and ensure it confirms on the Bitcoin network.
+**💡 Note**: The executor fee is a fixed BTC amount included in the transaction output. The executor is financially incentivized to broadcast the transaction and ensure it confirms on the Bitcoin network.
+
+**📋 Requirements**: Electrum 4.7.2+ with PyQt6 only. No pytest or additional dependencies needed.