Valentina Databases on Mac/PC

[Milan]

OK, I've installed on another PC, and, weirdly, it works OK! Could there 
be some leftover DLL files somewhere from an old install on the other 
machine (the one it still won't work on)?

I feel like I am making progress, but crucially, I'm still hitting my 
original problem. On the PC that is running the Xtra OK, I can create 
and access a database, but if I then try and query the database on the 
Mac it doesn't work, and I don't receive any errors. The same situation 
works in reverse - if I create and access the database on a Mac it works 
OK, but if I then try to query the database on a PC it comes back with 
no search results.

Are the Valentina database files stored in a format that would cause 
cross-platform issues?

mil.