Andrey I have done multiple tests:
1) uninstall from control panel.
Uninstalled tonfotos
Unistalled CUDA plugin
then reinstalled first tonfotos, quit, install cuda
2) uninstall from control panel.
Uninstalled tonfotos
Unistalled CUDA plugin
looked for folders under program files - removed
looked for folders under app data - removed
then reinstalled first tonfotos, quit, install cuda
still same issue, launch - deadlock - kill process - launch - ok
not sure if is related to this: https://community.tonfotos.com/d/344-onedrive-folder-not-scanned