But my app does not because the Tkx libraries are not included

I don't know how difficult it is to install Tkx on Strawberry Perl (or any other perl for that matter) as it's something I've not tried.

If you think it's worth the effort, installing a Strawberry Perl that's binary-compatible with ActivePerl would allow your Strawberry Perl to access the ActivePerl Tkx installation.

That is, if your ActivePerl is at version 5.X.b, you:
1) Install Strawberry Perl version 5.X.a (where a <= b);
2) Update Net::SSLeay (cpan -i Net::SSLeay) if Strawberry Perl's version of it is too old and buggy;
3) Append the location of ActivePerl's Tkx to Strawberry Perl's @INC. (Actually, I think use lib; is the usual approach).

If Tkx is accessing 3rd party dlls, then you may also need to modify the Strawberry Perl PATH setting to include the location of those dlls.

Cheers,
Rob