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.
This is normal, you are not supposed to actually install and use it, just place it somewhere and possibly test it out. The installer would make it look like it is a normal release. From the snapshots page: