Any update on this? I am also experiencing this behavior in SQL Data Compare 10.2.0.315. Per the "check for updates" feature, that is the latest version.
What is a little more bizarre is that when I use the Open Project dialog box, it displays both SCP and SDC files. All of the saved projects compare 2 SVN paths, so the "Data Source" columns in the dialog box are empty. I do observe that the SVN paths are in the SDC file.
Using SQL Data Compare with the 2 SVN paths works correctly. It's just that saving a SDC file is worthless for this comparison since I have to re-select all 4 SVN paths anyway (db + migration scripts for each).
Those SCP files work just fine in SQL Compare (10.1.0.102). In fact, the SDC file also opens in SQL (schema) Compare, but I'm not sure why.