Crazy encryption

Operating system

Windows

Joplin version

2.11.11

Sync target

File system

Editor

Markdown Editor

What issue do you have?

I had to migrate from Windows 7 to a new notebook with Windows11 recently. I have all my Joplin Profiles on an external HD and something strange happened: when I tried to open my Portable Joplin again on the new notebook, I discovered that all files named [ database.sqlite ] inside the profiles folders were encrypted. The only one spared was the one located at the root, which is 72.936 Kb
Since I never activated any encryption, I cannot imagine what the password could be used. The images are all OK, only the database had this problem. Any ideas?