We've just released RC2, as we discovered an issue with the Vault. This release also includes several enhancements and other bug fixes.
Download MainType 4 RC2 from our download page.
Important for current MainType 4 RC1 users: Do first fully uninstall release candidate 1 before installing this release. The uninstaller will ask you to Do you want to remove the MainType database, vault, and cache files as well, then please do so.