You can set the path to bcomp.exe
git config --global difftool.bc3.path 'c:\Program Files (x86)\Beyond Compare 3\bcomp.exe'
and configure bc3 as default
git config --global diff.tool bc3
The following should be added to your global .gitconfig file
[merge]
tool = kdiff3
[mergetool "kdiff3"]
path = D:/Program Files (x86)/KDiff3/kdiff3.exe
keepBackup = false
keepbackup = false
trustExitCode = false
Remember to set the path property to point to th...