This is a hoot, I look to replace another paid on-demand with this one and all this circus breaks out. Sorry about that.
A general observation: I can understand to a point that if you use a free version of a software, don't expect to get anything premium. Fine. Then my efforts to report these unacceptable issues to you is also worth something, no? I ask for nothing by the way, it's rhetorical and criticizes the nit-picking. If one has a browser open while installing RK, boom, there goes your browser with any tabs and work. HitmanPro can install without this Explorer quirk--wth. Insofar as the broken mechanism to draw attention to your ads, I'm virtually certain this is not unique to me; let someone else with the issue provide the dumps.
I used RogueKiller for several years as a donation-ware, meaning I paid decent little sums for using it maybe a handful of times for a better, more comprehensive scan. A free version is a good way to evaluate whether to spring for a paid sub as I happen to be in the market for one. Thanks for explaining the situation but this was some bad timing. Good luck to you, sir.