I just checked the source code:
Version: 3.0.1
* Requires at least: 4.0
* Tested up to: 4.2
This is in the header. 4.2 version is soo old. I paid for this addon €12.5 and just recognized it’s really not up to date.
Would you be so kind to fix this ASAP? It’s really annoying and I spend more than 20 hours to figure out what is the problem.