What seems to be the problem? What are the names of your images before you have to change them. You may have a problem with our without image handler...
If you want to remove the files, the best/easiest way to do so is to grab a download package of the module, the follow that structure to back out or remove the files.
Uninstall the SQL first though via the admin tool provided under:
Tools :: Image Handler 2
Use the admin tab located on that page to uninstall the SQL
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