It seems every time I restart SourceTree it now forgets the path to P4Merge selected as the External Diff Tool.
Oddly it remembers the path to P4Merge as the External Merge Tool.
So specifically, the drop-down selection continues to show P4Merge selected as the Diff Tool but the Diff Command is blank on startup. Selecting another (or none) External Diff Tool then re-selecting P4Merge corrects the value in Diff Command and after hitting OK to close the settings dialog the tool works as expected.
Close and re-open SourceTree and the settings are once again whacked.
This seems to have started happening about 3.0.6 but continues with 3.0.8 (not sure about the onset version). But none the less, this was all fine until some upgrade somewhere along the way and not it is PITA to go and re-select the DIFF Tool every time I start SourceTree so that it will do a diff as I expect.
