I've had similar issues too. I now for example have the problem that it takes a hell long time to "load" the conversation. For example, you open conversation, see ur Friends name with the latest txt message: blablabla, I click on it and it takes forever to load the messages, the screen where they should be stays black...

I have a (possible) solution though:

First gain root access:
sudo gainroot

..then switch to the target directory:
cd .rtcom-eventlogger

Now dump the contents of the existing database to a raw SQL file:
sqlite3 el-v1.db .dump > el-v1.db.sql

Restore the SQL to a new database:
sqlite3 el-v1.db.new < el-v1.db.sql

You may ignore SQL errors at this stage; they occur due to corruption in the source.

Now overwrite the broken DB (you may wish to back up the original file):
cp el-v1.db.new el-v1.db

Finally, ensure that the file is owned by 'user' and is in the 'users' group so it may be read by Conversations
chown user el-v1.db
chgrp users el-v1.db

Now close and re-open your Conversations app - the changes should be immediate!

You won't lose data. I hope this helps.