a little buggy, bad tech support

On my iMac it has a few bugs.
1. When I’m in “full screen” viewing mode, the top inch of the screen disappears. If I click out of full screen mode, then click back in it fixes the problem for about 15 min.

2. It stops playing audio, and when it stops it never comes back unless I reselect all the samples for each track.

3. It does not always keep my saved my work. I can save a song and reload it a few times, then suddenly it’s not there anymore.

4. I emailed the company via their website a week ago, still no answer.

I’m using a 2012 iMAC 2.7 GHz quad core i5 with 10.12.2

DM1 came so highly recommended, so I’m feeling like I just blew $10.

Aside from that I like it (when it works) the sampled drum sounds are really good and the effects/sequencer/mixer/ are too.
so it gets 2 stars. The other three come when they respond to my email and help me get this thing working. :)

M style 45 about DM1 - The Drum Machine, v2.2