I've been using Maxthon version 4.4.8.100 for some years now and it works just fine for me. I have Flash version 18.0.0.232 and that is fine also.
It seems to work well with my setup and I have no trouble saving the options unless I do a clean up of the caches etc, then I seem to lose them, but it takes no time to reset them.
So maybe it would be worth trying Maxthon, what harm could be done after all .