Adblock Plus

I had installed AdblockPlus for IE and apparently also ABPlus for IE 32 and 64.The icon/s disappeared after a short while, and the programs are no longer in the computer.
They just uninstall themselves?
Any suggestions? I have a Windows 7, and use IE 11.Thank you.

I woke up this morning and noticed that my Adblock has disappeared as well. I tried to repair it. Then I uninstalled, then reinstalled it. Of course it's still not working.