Hi, sorry to hear about your troubles. The tag editor it is case sensitive, as such the tags must be entered as they are on the products. You can view the tags in this format by viewing any product in your store admin, the going to Tags and 'view all'.

Hi, we're really sorry to hear about your issues - we designed this app to help people, not cause issues!

As far as we can see, the app has done exactly as it described, it converted your 'handle' tags to title case. The issue appears to be that you already had tags in the title format, so it effectively just removed the 'handle' tags, to prevent duplicates.

You can use the Bulk Edit Tags to undo these changes by using the 'Replace Tags' or 'Add Tags' features. We're always here to help implement either of these solutions!

The Bulk Edit Tags is a powerful tool, and we do recommend following the instructions and taking care before pressing big red buttons :)

We're always here to help, and help you get the most out of your store!