..and when you feel good with the new Strawberry Perl installation you can a) uninstall the activeperl or b) just clear PATH removing the activeperl entries and (permanently) adding the strawberry ones.

Other relevant entries (from straberry's portableshell.bat) are also recommended

set TERM=dumb
set PERL_JSON_BACKEND=JSON::XS
set PERL_YAML_BACKEND=YAML
rem avoid collisions with other perl stuff on your system
set PERL5LIB=
set PERL5OPT=
set PERL_MM_OPT=
set PERL_MB_OPT=
[download]

I'm also used to remove the file type association (check it with assoc .pl ).

L*