I have a backup file(Mbackup.db) but i cant restore it to the Msecure app.
Thank you for contacting us and I'm sorry about the issue you are experiencing. That is not a backup file. That is an mBackup database file. It cannot be used to restore anything in mSecure with. However, you can install mBackup and try opening the database file directly. It's encrypted with whichever password you used to create that database file in mBackup with: https://m7software.freshdesk.com/support/solutions/articles/36000030514-mbackup-download-links