Problem

"Download your SourceTree license" link is broken on my.atlassian.com.

Cause

When it comes to the latest SourceTree, you no longer have to manually download the license and install it into SourceTree.

All you have to do for using SourceTree is just login Atlassian Account once when you set up it instead.

Resolution

Please ignore the broken link and set up the latest SourceTree following these instructions.