Ok, I can suggest couple of ideas for now until I release the new version.
1. Try again. Delete the existing button. Create new custom HTML button, paste the script, save and drag drop, preview and “don’t save button settings again”.
2. Import/export -> copy the export data -> paste it in pastebin and share me the link. I’ll modify the settings and give you the data to import.
3. I’ll fix the bug and share you the changes.
Thanks,
Aakash