Are you eager to upgrade your database format to support the new features in OmniFocus 4.7, such as Planned Dates, mutually exclusive tags, and improved repeats? You might be interested in this support article on migrating your database:

https://support.omnigroup.com/omnifocus-database-migration/

Are you concerned about backwards compatibility with older versions of OmniFocus? We are too! We have a support article specifically about that, showing what features are compatible with what app versions:

https://support.omnigroup.com/omnifocus-backwards-compatibility/