False Positive on Dungeon Fighter Online Installer, & weird bug

Installer for Dungeon Fighter Online (http://www.dfoneople.com/, SHA1: 15da357f5e1c4fef759c743cf6358fe1e02f7974, an MSI package) currently being warned as a Potentially Unwanted Offer.



For some reason, after "Proceed"ing, I was unable to use my mouse to click on or interact with anything on its GUI -- only the keyboard worked.

I tried re-running, but Unchecky may have whitelisted the file(?), and it did not warn me again.