Yes it did. Anyway to reverse that? And don't be sorry, you were trying to help.
Luckily the command saved your old
.kde4 as
.kde4.new, so you just have to replace your current
.kde4 with
.kde4.new, or in other words you have to do the opposite of what you just did:
mv ~/.kde4 ~/.kde4.bak && mv ~/.kde4.new ~/.kde4Then you'll even get your
.kde.bak back, although I don't think you'll find much use for it as it made everything worse.