uner - 2014-08-19

I am using Rssowl for about 1 month
five days ago suddenly it broked and didn't work anymore
i think it was because amount of database and when i cut old rss.db and runed program again it worked as good as old time
my question is:
can i convert old *.db file to another format?
because it contains of a lot info and i really need it
or any other solution to use it?