Not sure if its part of the latest FW or GC mobi update but I am unable to "uninstall" any widgets, I just keep getting a red banner saying "uninstall error"
Maybe its the same as trying to uninstall a watch face that's in use... you can uninstall via the watch settings menu
It may be, and when I get a chance I will give it a shot, but I know that in the past when I have had issues with the "weather" widget I used to uninstall then reinstall and now it won't let me.