Where your data lives

What	Where
The program	%LOCALAPPDATA%\EpistulaMail
Message database and settings	%APPDATA%\br.com.epistula.desktop
Database key and account access	Windows Credential Manager, epistula items

The database is encrypted: a copied file, a lost laptop or a discarded drive reveals nothing without the key. The key lives in the Windows credential vault, protected by your session; with the EpistulaMail password on, it also depends on the password.