Total Uninstall - Compatibility with version 3
1. Old .tun files created by the previous version 3.xx are not compatible with Total Uninstall 4. To import the Total Uninstall 3.xx files into Total Uninstall 4 you have to use the Import action from main menu of the Total Uninstall 4 program.

2. Import options from version 3 in version 4 using the Import Options tool from download page

Total Uninstall - Compatibility with freeware version
Old .tun files created by the freeware version 2.xx are not compatible with Total Uninstall 4. To import the Total Uninstall 2.xx files into Total Uninstall 4 you must use Tun2to4 available on download page.

Start Tun2to4. It first attempts to detect the location of .tun files of version 2.xx and 4.xx.
If the detection fails please manually select the source and destination folders.
The number of files found in source folder is shown just above the source folder field.
Once the source and destination is chosen, start the conversion process by pressing the "Convert" button.