Thank you very much for the proper details, indeed there was a mistake. One apostrophe was incorrectly positioned in the label name, which caused faulty saving. Interestingly it didn't show up on my tests for some reason.
I have corrected the issue via FTP, it should work now. This fix will be included in the upcoming release, so you will not have to worry about it anymore.Best,
If you like my products, don't forget to rate them on codecanyon :)