I have a similar issue. The .gws file I saved from FW 1.10 will not load on 1.20. In fact, it won't load on 1.10 or 1.11 either. I have a slough of complicated settings. So the idea would be to save a file with these settings that you could reload when you upgrade the firmware. I saved the file assuming I would be able to restore the settings it saved, (if at least on the same firmware I saved it on). The file is corrupted. I saved a different file with minimal settings and it worked fine. This defeats the purpose. If you have minimal settings you can go through and change it back manually with ease. I have complicated settings which I cannot change back manually with ease and I cant load the darn gatweay settings. I even tried a .gws file I saved 3 months ago and it comes up with the same errors. Basically, the DIR-655 saves a corrupted .gws file if you have too many custom parameters! I need to somehow send my .gws file to dlink so on the next firmware revision, I can restore my settings. Or give me a way to somehow decrypt my .gws file so I can get my settings. Dangerous to supply a backup feature that does not work! Be careful when upgrading! Write down your settings if they are complicated, it is likely your .gws file will be corrupted! Boooo!
-viperware-