"being the nice Perlbrew not available for Windows"
It sure is! (Well, it's a perlbrew equivalent written in C#). My forked version of berrybrew has improvements and additional features over the original written by David Farrell, and can be fetched via git, or downloaded as a zip archive.
See "update2" below. You may need to do some fiddling with path to make it play nice with ActiveState, but I'd honestly recommend removing ActiveState first.
update: I did send in PRs to the original berrybrew, but the new maintainer felt that my C# coding style wasn't acceptable enough, and unfortunately, didn't attempt to modify my needed changes for inclusion, so I created my own fork. I'm not a C# dev, and needed specific features...(--with flag for exec, much better PATH env var management in subshells, adding/removing perls available without having to recompile etc)
update2: Just added an 'off' feature which disables berrybrew perls. This allows you to use berrybrew alongside system installed Strawberry and/or ActiveState perls without any issues or conflicts.