It's only been a short time since I installed my own copy of WithKnown (GitHub) and there have been a few small upgrades since that time, but I was overdue for upgrading. I'd also seen one or two errors when posting, and figured that the small bugs I was seeing would have been worked out.
When I went to upgrade earlier in the week, I figured I'd wing it since at the time there weren't any instructions for upgrading in the documentation (or at least that I'd noticed at the time.) Somehow I got sidetracked and finally just came back to it today. Following the general procedure for upgrading projects like Drupal and WordPress, I trundled along and found generally reasonable results until I realized that URLs weren't mapping quite properly, photos were missing, and something was a bit "off". (I had tried reinstalling my original config.ini file along with the Uploads file, but that didn't seem to work somehow.)
I went back to check the documentation, and lo-and-behold, in the intervening week, there are now some scant upgrade instructions available which follow below:
I was reticent upon visiting my homepage as I received a splash screen exactly like the original set up, and was very worried that I might manage to blow out some of the primary data and crash the whole thing. (I did remember to do a back up before starting, but who wants to deal with that if they don't have to.)
I decided to plunge ahead and proceeded like I was setting things up for the first time. I was directed to a page to enter in the database name, login, password, etc., which creates a config.ini file in the root, and was then redirected to my site, with all the links and data perfectly intact and functioning properly.
For those who haven't done it themselves, and have the same reticence I did, I'd recommend adding a few additional steps to the process:
Depending on what one is using for the update, I might also recommend blowing out (deleting) the original Known files in your root directory in step 2, and installing the new ones rather than simple overwriting so one isn't left with out of date files.