Moving Criptext emails to another email client

Hello,
Is it possible to move my Criptext emails to another email client like Thunderbird.

As Criptext is no longer maintained as far as I can see, and the mobile app continually crashes ... So I want to move all the emails to Thunderbird ..

The only problem is the the DB is encrypted - I know I could forward each email, but that would take for ever ...

Any advice please??

Thanks!

