I'm not really familiar with Inkscape on Windows, but un-/re-install should work. While you're at it, you may want to upgrade to 0.45.1 (the 0.46-preview releases have some big problems on Windows right now).
I'm not really familiar with Inkscape on Windows, but un-/re-install should work. While you're at it, you may want to upgrade to 0.45.1 (the 0.46-preview releases have some big problems on Windows right now).