Power InRoads V8i SS4

Within power inroads v8i ss4, after I have selected the correct "Preference File" and I can see the correct .xin file, when I select "Named Symbology Manager" why cant I see any data within the .xin file? I just see blank space, and I cant edit the file. There was no .LCK on the xin before I opened the file. This is something which just started happening within the last few weeks. I have spent a lot of time and effort creating this file so that field survey data can be correctly imported and all features are put to the correct cad standards for our company. Now I can no longer manage this file. As far as I can tell none of our .cfg files have been altered, and I have checked that they are all pointing to the correct places. I am reading all of my specs through .dgnlib files, and I have verified that all of the .dgnlib files are in still in the correct location on the network.