Users of Microsoft MBASIC 5.2 may find this of interest:

It's sometimes annoying not to be able to LIST a .BAS file
you previously SAVEd using the ,P (protect) option.

If you bring up MBASIC 5.2 and do  POKE 23899,175  then
LOAD your protected file, you will be able to LIST or SAVE
it in normal format.