Haven't worked with Sourcetree for a few weeks. Just tried to open it and it simply doesn't start anymore. Shows splash and that's it. How?! I didn't even touch the damn thing!
Had to delete some cache file:
C:\Users\%USERNAME%\AppData\Local\Atlassian\SourceTree.exe_Url_iksypoc0vscdh5skml2lwon0nfomwyte\3.4.7.0\Composition.cache
Still ridiculous that you even have to deal with this, especially without any error message that indicates what's wrong. Shitty UX.