A simple fix to permanently get rid of that nagging banner ad.
Open Foxit, deactivate the banner ad in the "view" drop down menu, close Foxit. Repeat the process until the ad no longer appears.
When I tried this it took six times for it to work, but work it did. I installed it properly (not under Returnil), and rebooted afterwards just to be sure, but the ad hasn't reappeared.
I only had to do it twice and it worked. Lets see how long this lasts though. So far I have open and closed Foxit about 8 times and the ad has not come back.
Yeah, i already knew this. I still use the old (1.0) version as my default PDF reader. I have the newer version too, though. I don't work with PDF's that often.
Edit: Well, i downloaded the latest Foxit reader and set it as my default .pdf reader.
Here you should be able to see the ads which seem to be set to zero each time you untick "Advertisement".
I found those entries Humpty when I first searched the registry for a fix, and although I kept deactivating and activating the ad, and then refreshing regedits page, I couldn't see anything changing at all. The 1's stayed as 1's and the 0's stayed as 0's.
Maybe I was looking for the wrong thing, so I tried a good old google search instead.