Corrupted collection, crashing deck

[Don Dullian]

Hello. I've been having problems corruption problems ever since I tried some beta version of Ankidroid  2.5, which worked better on my device but ultimately ended up corrupting my files, so I had to revert to official 2.4

Anyway, I'm on 2.4 at the moment, first I've had problems with my collection being corrupted on opening Ankidroid, but since yesterday, while reviewing the deck I mostly use, Ankidroid started crashing on me and corrupting my collection and wiping my decks. It doesn't seem to happen with other decks but the one I mainly use, after about 10 card reviews approximately. The crashing, though, doesn't seem to happen while viewing new cards. Very strange. 

Another thing, I already know that my collection might have been corrupted long ago since I'm unable to sync it to my Anki account (Ankidroid crashes and my all my decks are wiped), can't export decks (Ankidroid crashes and my all my decks are wiped as well). Repairing or checking the database doesn't help, my decks remain lost. 

The only way I've been able to 'backup' my progress is by copying the files collection.anki2 and collection.log from the AnkiDroid folder, restoring them upon corruption. 

Any help to repair the database, or at least make a proper backup of my progress, by uploading to my Anki account or exporting working decks?

Thanks

[Tim]

http://ankisrs.net/docs/manual.html#corrupt-collections