Was having same major problems since the April public update, very slow loading and not waking after sleep just to name a couple of the big problems! I cleared the epg as suggested and updated to the new Beta software. MyTVonline now loaded as it should but will have to see if sleep problem is fixed as well. That last Public update was a huge step backward for me, so happy to see the new beta software !!
Update: It's been a few days now and it is like night and day the difference since clearing epg and updating to New Beta Software release, I'm back to loving my Formuler Z7+ after being ready to toss it across room. 