修改属性为：
"本地文件夹路径\BComp.exe" %base %mine /title1=%bname /title2=%yname /leftreadonly
"本地文件夹路径\BCompare.exe"
修改属性为：
"本地文件夹路径\BComp.exe" %mine %theirs %base %merged /title1=%yname /title2=%tname /title3=%bname /title4=%mname
TortoiseSVN设置比较工具为BeyondCompare
原文：http://www.cnblogs.com/lianghui66/p/3995223.html