We recently fixed a compatibility issue with the latest Photoshop version. Here's what you need to do:
1) Close Photoshop
2) Delete the Photoshop plugin. (Place the JPEGminiPhotoshopPlugin.exe file in the trash and then empty the trash)
3) Download the JPEGmini Photoshop extension update by going to our download section. The URL was sent to you in the welcome email you received after purchasing JPEGmini.
Once you've downloaded, please follow these simple directions: https://help.jpegmini.com/help/how-to-activate-jpegmini-photoshop-extension-on-a-pc