Hi Catymag, I've done all that and using winrar 5.40. I've even tried uninstalling and reinstalling winrar in case the the unzipped file has somehow got corrupted but no joy. The file is still showing as locked and signed in GMapTool.Have also made sure file is not read only. Can only think that something, somewhere in my PC is blocking gimgunlock from working. Any more thoughts appreciated.
Once again thanks for help. Now working without reloading gimgunlock. I won't go into all details but it seems that the whole process is very sensitive to the order and where files are placed and configured to work. ie a * up on my part!