1. Not sure what you're talking about in regards to a KDEsu window - do you mean the red Root xterm window? Regardless you don't need to change any config file in order to adjust the time and or time zones for the clock on the desktop. Instead, tap just to the left of the clock itself on the taskbar. This should cause a vertical white checkered line to appear & if you tap again at the very tip of that line a menu for the clock will appear. Another alternative is to right click on the clock and you'll get the same menu.
2. As for why your Right Click doesn't toggle back to a left click - well the only thing I can think of is a typo. Have you tried the SED script that I posted in that other thread? That's the script I'm personally using - although there shouldn't be a difference between the two. Someone else also posted a third alternative script that might fix your issue - although I haven't tried it out personally. I would recommend copying the text from that thread and pasting it directly into a KWrite/KEdit document to ensure it's exactly as is posted. One more thought - sometimes it does take a few tries to get the toggle to retutn to Left click from Right click, so have you tried several times?
FYI - IMHO, it's not absolutely necessary to Right click to be able to use KDE - with a very few exceptions (I can only think of one but there might be others) there are alternate ways of doing everything that a Right click provides. I very seldom use right click at all.