I had a similar problem removing Translatorbar 5, so did it this way. However, a word of caution: be VERY careful about what you delete from the registry as it could create serious problems. Ensure, BEFORE you delete anything, that it definitely refers to the Translatorbar!! Once I'd completed the removal of Translatorbar, I followed exactly the same procedure afterwards to remove Conduit Engine which had also attached itself and which (I think) was part of the program.
Go to Start
Go to EDIT at the top of the page
Click on FIND
Type "Translatorbar 5" then click OK
The system will trawl through your registry files looking for anything to do with this product. When it finds one, it will highlight it.
Hit DELETE, then the RETURN key
Hit F3, which will find the next instance.
Continue until you get the message "No more files found".
Once you are cleared all the files, restart your browser. This works for both Firefox and IE.