according to Decrypt My Files it seems to possible to disable the signature check during encryption / decryption in case of missing, corrupt database.
Disabling signature check does not work for me. A added “return true” as you mentioned. Than I get a “Missing signature” from hassignature-function. Therefore I added an “return false” and now decryption failed with “Encryption library: Decryption (symmetric) of content failed”.
Do you have any hints to decrypt files without (correct) signature from the database?
Anyhow it would be great to store the signature check not in database (maybe direct in filesystem?) or disabling the feature because its not that robust e.g. if you move files from an external storage not within nextcloud.