For an OBS install:
- Assuming you are running darktable as standard i.e. not using the –configdir option, the lockfiles would be in ~/.config/darktable assuming they existed.
- If you are comfortable with the command line then run darktable -d all which may give you a clue as to why it’s locking.
Flatpak install : I don’t know where the folder would be and I’m unsure how to run it with the -d all option.