Hello,
If your Firefox profile is corrupted, then the issues is not related to my add-on.
If you cannot use Firefox reset feature, you can try to clear your storage folder:
Go to "about:support" page, click "Open folder" button next to "Profile Folder" label and delete content of "storage" folder. Before doing this, make sure to backup whole Firefox profile folder and make sure your Firefox is not running.
You can also contact me to my support e-mail if you have more questions or if this doesn't help.

Best regards,
Juraj Mäsiar