gistfile1.txt

1.) Close the Craft Manager.
2.) Go into Sketch, and navigate to Plugins -> Manage Plugins.
3.) In the pop-up modal, select Craft, and click the gear icon in the lower left and select the uninstall option. This will move some items to the trash.
4.) Open the Activity Monitor, and force quit the Craft Manager and Panels (if applicable) processes.
5.) Open Spotlight and search for "~/Library/Application Support/"
6.) Delete the "com.invisionlabs.CraftManager" folder and "com.invisionlabs.CraftManager.json" file
7.) Open the "com.bohemiancoding.sketch3" folder
8.) Delete the "Panels" folder (if applicable)
9.) Open the "Plugins" folder
10.) Delete the "Panels.sketchplugin" file (if applicable)
11.) Navigate to the "Downloads" folder.
12.) Search for "craftinstaller" and delete any files that deal with the Craft Installation process.
13.) Empty the trash.
14.) Make sure there is only 1 Sketch version and that it's located in your Application folder
15.) Go to labs.invisionapp.com/craft and download the Craft Installer.
16.) Install the Craft Manager again.
17.) Install Craft for Sketch from the Craft Manager.
After completing the above steps, please let me know if you're then able to pull up the Craft panel and if it works in Sketch.