First, you should have waited for downloading EHAM because the version with AES support will be different anyway, so you'll will need to download it again.
However, I think you have PC issues that are not dependent from anything we made, like FS9.EXE still being active in the previous message (not normal), and now this.
Try just this one, as a last resort:
- delete bglman.dll, bglman.dat and bglmand_fsdt.dat from the MODULES folder
- download and install our STANDALONE Addon Manager for FS9.
If that still doesn't fix it, I suggest considering reinstalling FS9, or maybe even Windows, from scratch, because you are having other problems.