Please don't get me wrong, but there is a reason why software is updated, so I don't see any sense in complaining about flaws of version 4.5x; This support forum is for users with problems so it isn't a wrong step to write your problems here, when you look to other threads you will see that there are always EMSI employees around who try to help.
Version 5 is much faster and I don't feel any impact on my system, neither on my i5, nor on my [email protected]
So the 1. thing I would recommend is that you always use the newest version of a program.
Maybe you should try a behaviour blocker like Mamutu. Because a HIPS is a HIPS and will always have it's flaws, if this would be the perfect security solution then Microsoft would have implemented it already, don't you think?
I don't know any HIPS that doesn't has problems with certain programs, look at other forums where ppl complain about similar problems.
There are million apps out there and with every update sth important can change that will need a user's input.
If this kind of security software is too anoying to anyone he/she maybe should change his/her security policy.
VLC is one of the most used video players out there so it is also one of the beloved targets of malware writers and there have been a lot of leaks in the last years:
So IMHO it isn't that bad that OA is a little too "sharp" on such things.