How to update?

Hi Team,

I have purchased the pluginn boost sales. Some functions are not longer working, like the variation dropdown in the pop up. A time age I had to insert js code to make this work.

But it failed to work now. I thought maybe an update will help.

In the pluginn panel I see there is an update, but when I click update nothing is happening. I dont know how to update the pluginn!

Hope you can help me out.

Thanks
Regards
ALex Konijnenburg