So i decided to use my LoLReplay again. Surprisingly it started to load unlike before, where i couldn't even open it. Everything is fine to one moment during loading where that replay crashes - typical bug splat. Anyone else got same problem?
I know this program is buggy like hell but it works for some people.
So it looks like newest version of LoLReplay works wonderfully, but replays recorded before update cannot be watched due to bug splat. It's either fault of corrupted replay or game client making it crash. Anyway, time to delete some stuff - WHOLE 11 GB OF DAMN REPLAYS. I got all stuff saved, starting from november 2012.