Deblurring an out-of-focus image

I have several scripts, plug-ins and more (G’MIC) for deblurring an
image which is (slightly) out of focus.
But then someone showed me the result of applying Topaz Sharpen AI on
an image of my own.
It was really impressing.

Unfortunately, I cannot use Topaz Sharpen AI since it doesn’t run on
Windows running in a VM (Virtualbox)
and I don’t have a native Windows here.

Does anybody know something which comes close to Topaz Sharpen AI
(either on Windows running in a VM
or even better running in Gimp or G’MIC)?

Many thanks for a hint,

I haven’t investigated this tool yet, but it seems like what you were looking to do.