Sourcetree crash on invalid path in .gitconfig

Steps to Reproduce

1. Open your global .gitconfig
2. Make an invalid value (e.g. unescaped slash in `excludesfile` like "%userprofile%\global.gitignore")
3. Attempt to open Sourcetree
4. Whatever repositories were open before have been closed, shows repository list with refresh icon next to each
5. Attempt to open a repository, BugSplat crash reporter appears
6. Fix invalid value in global .gitconfig
7. Opening Sourcetree and the repository works

Workaround

Manually edit the config file