All paid software (private download) unknown for search engines, means not searchable. Browses thinks the file not trusted and not famous, so you may see something like this.

after you click keep anyway, you will see download folder icon click on it and run the program there, or just click open file to run it.

Click more info,

Then run anyway.

You see this kind warnings and blockages for your safety and to protect your computer from viruses or malwares, spamwares so on.