Operative System: macOS High Sierra 10.13.2 (17C88)
Issue starting date: 01-06-2018
Sourcetree version: 2.6.3a
Description:
Sourcetree app is crashing on startup even though I've upgraded it to the latest (2.6.3a)

I understand this issue had happened before due to some xCode distributions but I haven't updated my version in the last few days and yesterday it was working like a charm.
Anyone who could help me I would really appreciate it. Thanks!