OH... I was so excited to check this out, but then my heart sank in my chest when I opened it and saw "Built in Unity". You see, every few years, Unity train-wrecks their platform, and everyone who's been developing in it has to trash their code base and start over. PLEASE please please, convert this to some other platform! At least keep some sort of clear text copy of whatever code that you can, so that you can port it to something else at some point in the future, if/when Unity flatlines their platform again! It is SO hard to find really good soundboards like this. I REALLY hope this one lasts!
I understand your concerns with Unity's history, but I remain confident that Unity is the right tool for Sound Show. The choice to use it has been key to how far this project has come: multiplatform support, strong multimedia capabilities, a rich asset store, and ease of programming with C# are just a few to mention. Unity's board seems to have realized they can't do everything they want. Their leadership has changed since the latest events. Also, if they make really bad changes in the future, it will only affect new versions of Unity. So, I feel quite confident for the time being.
Thank you for the kind words about Sound Show :)