Author of plugin is
wpplugins@techie-buzz.com. Tell him your problem, also post at wordpress.org.
Check with your web host they should be able to roll you back to where you started the upgrades. Ask for a database rollback as of the date one day before the upgrade. Time is of the essence as any hosts I've dealt only keep the databases for a week or so
It is possible to work on the database manually, though to be sure not for the faint hearted.
This is probably why one should wait at least till the Version is 1.0, not 0.x
Try posting in the Blogging forums here ar SSWT. Best wishes for a quick return to normal