Integrating ProDiff with Tortoise SVN
ProDiff can be easily integrated with Tortoise SVN. Follow these steps to setup ProDiff as the default tool for Compares.
Step 1
Right Click in Explorer click TortoiseSVN > Settings.

From the Settings tree on the left hand side locate "External Programs" then expand the tree node and click the Diff Viewer node and you will see the following screen:
Step 2
Ensure the External Radio Button is checked, choose the ProDiff by clicking the "..." button and locate the ProDiff EXE file (usually located at C:\Program Files\PBDR\ProDiff\
Lastly enter "/S %base %mine" for the arguments, this tells ProDiff to start in SDI mode and to compare the 2 files passed from Tortoise SVN.
Your screen should look like the one above
Step 3
Click OK