All articles ← Knowledge Base I have lost my serial number how do I get another one? If I buy skEdit Express on the app store can I convert that license? If I buy skEdit from you the site can I convert that to the Mac App Store? Invalid License when upgrading to skEdit 4.1.5 Lost Projects when upgrading to skEdit 4.1.5 Mac OS X Mountain Lion (10.8) - installation issues Support for John Grubers Markdown Language The serial number that I was sent or downloaded does not work. What is the difference between skEdit 4.1.5 on skedit.com and skEdit 4.1.6 on the Mac App Store? What is the difference between skEdit and skEdit Express?