You can try to setup Notepad++ Integrated Perl Debugging, but not being familiar with Windows it may be more trouble than it's worth. LanX above mentioned Devel::ptkdb and I use that with Notepad++ 64-bit since the dbgp plugin for 32-bit isn't available on 64-bit Notepad++.

I also prefer Strawberry Perl as a longtime Windows user FWIW.