Added clean uninstall and reinstall guide

clean-uninstall-and-reinstall.md

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+# Clean Uninstallation and Reinstallation Guide for ECU Workbench
+
+This guide explains how to completely remove ECU Workbench from your system and reinstall it from scratch, avoiding conflicts, errors, or leftover files from previous versions.
+
+## 🧹 1. Program Uninstallation
+1. Download the web installer from mcuinnovations.com. (https://mcuinnovations.com/software/ecuwb/)
+
+2. Run the installer and click “Uninstall”
+<img src="images/1-EWb-Setup.png" width="80%">
+
+3. Enable the two checkboxes as shown in the image, then click Uninstall
+<img src="images/2-EWb-Unistall.png" width="50%">
+
+## 🔄 2. Operating System Restart
+
+A restart ensures that:
+
+- any locked files are released
+- leftover processes are closed
+- the system is ready for a clean installation
+- 
+## 💾 3. Clean Installation
+
+1. Launch the Web Installer
+
+2. In the two boxes indicated by the arrows, you can view and select which version to install (Stable or Development), then click Install
+<img src="images/3-EWb-Install.png" width="80%">
+
+3. Start the program to verify that everything is working correctly.
+
+## 🧪 4. Final Check
+
+After installation, the program should start without errors.
+If everything works correctly, the reinstallation is complete.
+
+## 📌 Additional Notes
+
+- If you encounter errors after reinstalling, report the issue including:
+  - software version
+  - operating system
+  - any logs or screenshots
+
+**Guide created to help users solve common issues without requiring support.**

images/README.md

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+# Placeholder