I had issues when I installed, but that was before the ISO was available as a download. Look in the first topic thread for my experience. Much of that is probably resolved by the new ISO.

The main issue with the 64bit beta is that you cannot change fonts without crashing the program. If you do, you will need to delete your ini files and start your settings again from scratch.

So, I suggest you use the scaling option to adjust font size until this is fixed, if it ever will be.