at the command prompt,

C:\perl -v

  a lc -v gives a shortform of your perl version (uc "V" gives far more detail).

Your report of two different builds suggests that you do indeed have more than one (build of) perl... which, in turn, suggests that your path, associations or somesuch dose'y thing changed during your five minutes (or, I suppose that you have one which is badly b0rked).

You may wish check path... and perhaps windows' search as an offhand way to check the possibilities of multiple builds in distinct directories.