First of all, I need to apologize. I did not realize that Steam wouldn't notify me when I had new Discussions. I promise that I will be very active with the community though :) Please note however that I am a solo indie developer with another job as well, so I cannot be on here 24/7. I promise I will try my best though.
So some people are having problems opening the game. Thanks to one of the players, we figured out that it is due to the Launcher being picked up as a false positive by some antivirus software. Apparently this is also a common problem with games created in the RPG Maker engines.
I will be trying to find some sort of solution today, but I can't promise if/when I can do something about this. For now, you can try the following:
1) Disable your antivirus software when you launch, or
2) Add it to exceptions
Again, I apologize for my lack of presence and for these problems.