Avast suddenly deleted a component DLL of a mouse utility that has been on the computer for years. It suddenly didn’t like reel.dll that was part of a mouse utility Flywheel that restores mouse wheel scrolling to my father’s Lotus 123. I installed Avast Free Antivirus a couple of months ago and they got along and it didn’t start blocking and deleting it till recently. I have used Flywheel for years with no problems on two different computers. Do you think I am safe creating an exception so it can run?