Perl Tk is not the best for image editing. For a nice editor that runs on win32, try Gimp for win32. When you install it, it will ask you if you want it to be the default veiwer/editor for all file types, say yes.

Back to Tk/Gtk2 etc, it is often convenient to use these for simple things like adding images to other images (overlays of logos, etc), or annotating text on images, that you can position easily with mouse drags. See Gtk2-annotate-draggable texts on image for example. Gimp takes awhile to start up, and the menus are very complex, so for simple tasks like annotating/positioning text, your own custom tool is nice.

If you want a fast way to setup for Gtk2 on win32, install Gimp (above), and put in Camelbox: A build of Gtk2-Perl for Windows to get Per 5.10 and Gtk2 all in one easy step.