I have Cura 4.2.1, and there is neither a printrun folder, nor a plater.py.
I do "light manufacturing" on 2 projects - where I print 15-30 at a time - little Jigs for "Build-a-Blinkie" LEDs, or CR2032 battery holders to avoid them shorting out in a pocket/drawer etc.
Finding the duplicate button (or whatever it was called) missing, *and* the above workaround not being found, I'm seeking help.
Thank you!
Ward Christensen, inventor of "Xmodem" and "BBSs". (in the WAY-back time)