Registration key worked for me, Windows 10 64 bit. Both 32 bit and 64 bit versions of the program run.
They were both installed into the same folder in Program Files (x86) which is a bit of an odd way of doing things
At the end of the install a window popped up in a browser (MS explorer 11) that wasn’t my default browser , which is a bit rude. Not sure what the behaviour would be if you didn’t have MS explorer installed.
I was asked if I wanted perfect pdf to be the default app to open pdfs – to which I said no. But it removed my existing association of which program to open pdfs – also a bit rude.
The progran itself seems to work very well for editing text so I can forgive the clunky install.