When I try and open MCreator for the second time it will get stuck on "Initializing workspace system...". In the time it takes for it to never load I can completely install a second MCreator and use that, though trying to reopen that comes up with the same problem.
MCreator issue tracker has been migrated to GitHub.
Existing tickets have been migrated to GitHub. Please open new tickets on the GitHub tracker instead. If you do not have a GitHub account, all feature requests and bug reports from forums are still considered and checked by the maintainers.