If you check the setting "Disable Computer Keyboard" setting to suppress sounds from the computer keyboard, the setting reverts to unchecked when you close Rapture Pro Stand alone and restart it. In other words, Rapture Pro Stand alone does not remember that you have checked that setting.  Not sure of this is an actual bug or whether this is by design.

promidi
If you check the setting "Disable Computer Keyboard" setting to suppress sounds from the computer keyboard, the setting reverts to unchecked when you close Rapture Pro Stand alone and restart it. In other words, Rapture Pro Stand alone does not remember that you have checked that setting.  Not sure of this is an actual bug or whether this is by design.

Confirmed, MIDI settings revert to enabled musical keyboard every time you close the stand alone version. This does not happen with the other audio settings thankfully. I'll communicate this to the team.