The translations got out of sync with the main code, and while this normally doesn't cause problems, they have in v2.98 final. I didn't realize the problem existed, so people picking those languages may have been disappointed to see the Process Lasso GUI just crash.
Users who have had this problem should uninstall Process Lasso, then reinstall. Alternatively, deleting the pl_rsrc_russian.dll and/or pl_rsrc_polish.dll should fix the problem.
I apologize for these troubles and will get a new final build out as soon as I can.