On 3.0.8, I have an external, custom diff tool defined with arguments. I can set these via the options dialog, exit SourceTree, and can confirm they are stored in my .gitconfig file. When I open SourceTree back up and go into the options, the arguments field (for both merge and diff tools) are blank. The path to my custom command remains however.
Custom diff and merge command: C:\Program Files (x86)\WinMerge\WinMergeU.exe
Diff arguments: -e -u -wl -dl \"Remote\" -dr "Local" $LOCAL $REMOTE
Merge arguments: -e -u -wl -dl \"Remote\" -dr "Local" $LOCAL $REMOTE $MERGED
I'm trying to call WinMerge in this way since the listed "WinMerge" entry in the dropdown
doesn't appear to work. My custom configuration works great, it's just that the settings are being removed when the application is started - I can observe my settings being deleted from my .gitconfig on startup of the application.