New SourceTree is here
blog.sourcetreeapp.com
blog.sourcetreeapp.com
In the last just-open-it-and-its-broken update Git was inoperable because SourceTree got confused asking for credentials.
https://jira.atlassian.com/browse/SRCTREEWIN-4187 (this one's my favourite: "New UI is a huge clusterfuck")
https://jira.atlassian.com/browse/SRCTREEWIN-4188
https://jira.atlassian.com/browse/SRCTREEWIN-4196
https://jira.atlassian.com/browse/SRCTREEWIN-4240
https://jira.atlassian.com/browse/SRCTREEWIN-4249
https://jira.atlassian.com/browse/SRCTREEWIN-4258
https://jira.atlassian.com/browse/SRCTREEWIN-4273
https://jira.atlassian.com/browse/SRCTREEWIN-4276
https://jira.atlassian.com/browse/SRCTREEWIN-4278
https://jira.atlassian.com/browse/SRCTREEWIN-4286
https://jira.atlassian.com/browse/SRCTREEWIN-4288
https://jira.atlassian.com/browse/SRCTREEWIN-4297
This one seems to be the most heavily commented one: https://jira.atlassian.com/projects/SRCTREEWIN/issues/SRCTRE...
And lots of opposition outside the issue tracker too: https://answers.atlassian.com/questions/36182163/did-anyone-...