Delete all data

[VirusR86]

Suddenly all data is deleted (wallet, categories, transaction, places, everything!), i didn't delete the app or something else, yesterday i report my transactions and this morning i just opened the app and BOOM 6 years of data deleted :(

I don't have a backup, but I would like to know the database path to try to restore it manually, is it possible?
When i save a transaction what and where is the file written?

Please help me, thanks