Sorry to post before anyone responded to my previous one, but having placed my components I have hit a brick wall that might require me to revert to the previous release already.
I have been able to add a new net class to the design rule dialogue, and apply it to selected nets, but I cannot find a way exit the dialogue and save my changes. The same applies to the global design rules tab, meaning I have no way to change track widths from the default.
Maybe this is user error, but I have been trying for ages to figure out how to apply my own rules. For once, I really do hope it is user error.
