To get out of stuck SHIFT KEY hp prime emulator on Mac

[tcab]

The stuck shift problem happens regularly, on different Mac machines. After the ‘fix’ the emulator runs fine and is not unstable - till it happens again, which unfortunately won’t be too long.

If I’m regularly jumping in and out of the editor and testing a program, it probably happens every 10mins. Restarting the emulator will often lose my work (e.g. if the stuck shift happens inside the editor and I can’t get out with ESC to save) and has no benefit, as the problem just happens again anyway in the rebooted hp prime calc emulator.