I don't think a re-install would be necessary. If you cannot "find" where the toolpath menu was dragged to and a restart of the program doesn't restore your default window/menu layout, try going to Preferences and choose the restore button from there.
(I might have exact terminology/wording for restoring default settings slightly different than the software terminology, but hopefully you get the idea! - I'm on holiday and didn't bring a computer with me this time!)
-ShopBot Buddy PRSAlpha CNC