Had the same thing. I use Firefox as default browser. Searched Google why files are blocked while attempting to download them.
On a support page of Firefox they stated that the website (they were talking about) was reported and blocked by Google. I tried downloading the previous version of the trainer for this game and it worked. So the blocking is only for the v1.00 one.
Workaround for Firefox
Go to setting → Preferences → Security → checkboxes and un-check the boxes that says "Block reported attack sites" and "Block reported web forgeries"
Un-checking the first checkbox (attack sites) did it for me.
what a complication here .......
i use firefox, and i have an blue arrow at top right everytime i download something (show progression). just clic on it, it open the downloads list, it show you "this files have been blocked etc.." , just right clic on the files and select "unlock this file" and voila.
(you can also clic on TOOL , download (ctlr+J) and right clic on the file in the list and select "unlock"
why make things more complicated ^^