Can you try deleting the installer .exe file you tried from your PC. Try downloading from scratch from the Topaz Downloads page & see if it was just a flukey initial download. You might even wanna Restart the PC for good measure. Then try the latter installer file.
Also, if you use Topaz products you are aware, don’t have any other host programs (Ps, Lr, Corel, Affinity, etc) open when you run the installer for Studio 2.
Bingo. Strange, but sometimes the simplest things are the most difficult. Have done thousands of installs over a period of over twenty years and this is the first time I’ve encountered this … was using an Install monitoring / snapshot software, which is what caused this. Dragged a corner of the window, voila!