Right-click the Launchpad and click "Troubleshoot compatibility."
It opened before
An abrupt shutdown like a BSOD might've corrupted its configuration. Deleting the "Stand Launchpad" folders in your %userprofile%\AppData\Local\Calamity,_Inc folder will reset the configuration, hopefully fixing this problem.
Injecting Stand has no effect
Click "Open Stand Folder" in the Launchpad, delete the "Bin" folder there, then try again.