Say I have 4 revisions.
Is there a way to see the file, as it was in version 2, for example? I cannot find an option to open an older version in TortoiseMerge
Use the "Show log" in the file to view the changes, there you can open the old ...
you need to install
win merge
http://garr.dl.sourceforge.net/project/winmerge/stable/2.12.4/WinMerge-2.12.4-Setup.exe
and it will be integrated with the tortoise automatically, then you can view the file with the current one to see the changes