Well, what should I write in detail... Unfortunately, there are still apps here on AppSumo that are unable to meet the simplest requirements properly... One of them is that the license should also be retained and not simply have the buyer "basically" tricked and have their license stop working. Then all that’s left is the ugly watermark.

Also, the license cannot be deactivated (what's the point of having a designated button for that)...

After uninstalling and reinstalling, entering the license key again only shows the error message: license_key not found.

Bravo. The most basic functionality does not work. So it is unusable.

It's strange that such occurrences always happen after the valid refund period.

A schemer thinks nothing bad of that!

I advise everyone against making a purchase!

--- Update -----

Many, many days have passed since I reached out to the owner, just like others who have been taken advantage of by Sumolings. Until today, NOTHING. And then it is said: Sumolings will only be supported until version 3.0.0. What does that mean exactly?
That the tool will be unusable again?
Because that seems to be more than just the standard here.
I have written off my money and will no longer support low-level providers through an investment!
This behavior harms other providers who take their customers seriously!