Important information for customers who purchased Yojimbo 3 from the Mac App Store:

Yojimbo 4 is not for sale in the Mac App Store. However, we feel that Mac App Store customers should have the same opportunity to upgrade as those who purchased directly from us.

If you purchased Yojimbo from the Mac App Store on or after June 14, 2013, please contact our sales department for assistance in upgrading.