Ok, I've found that version 7 save the first line of SkirmishSettings.ini with an error, putting commas between "name" numbers: then, it can't load it next time, so it restore the default settings.
After I've upgraded to version 7, the personal skirmish settings are not loaded at startup. They are regularly saved in SkirmishSettings.ini, but at startup only the default settings appear, forcing me to manually put back every chosen option.
Any solution?