I use VarAC on two different computers (never at the same time) and the computers are synchronized with NextCloud desktop. I host my own NC instance.
In the config I am able to set the path for the ADIF file to a folder on my PC that is within the scope of the Nextcloud folder that is synchronized, so that the ADIF file contains all records fom either station.
I am not able to set the full path for the Varac.db file so on station A there is no record of stations worked on station B and vice versa.
Please consider a path setting for "logs" generally which could be set to determine the location on disk of the ADIF file and the SQLite db file, or at very least the ability to set the full path to the SQLite db file so that could also be syncrhonized across PCs (stations).