What's New:
- Fixed crash in RTNERR when switching back to NSTK mode after FUNC/L4STK.
- Fixed ASSIGN "" in programs.
- Added PRREG to the PRINT menu.
- NN→S now ignores the display mode and always acts like ALL mode is active.
The idea being that if you care about the display mode, you'll probably be using N→S, and you only need NN→S if you specifically want to see full internal precision.