I'm sorry again, but this is not arrogance, but a banal mistake - I downloaded an incomprehensible version under the guise of a free application "tabs and accordion".
Yes, you can buy the extension. You are on your own on fixing the issues you have on your setup due to installing the illegal software.
If you have questions about Tabs & Accordions that is running on a clean setup, after reading the documentation, I am happy to help.