Hi, through Trial-and Error I found the solution to that problem.
Works for both steam version and download version.
Locate your spiral knights installation folder and note the address.
For Steam it's C:\program files\Steam\steamapps\common\spiral knights
Now open the following 2 files in your browser, and override the existing version in your spiral knights main folder.
If you don't get a "save as" dialog then use the "save page as" function in your browser!
http://download.threerings.net/spiral/20110624142539/digest.txt
http://download.threerings.net/spiral/20110624142539/getdown.txt
Start the Client and get back into action.
If it doesn't work you may need to reinstall.
The problem here is that those two files are stored using a different character-encoding than the ones on the server and thus have an incorrect hash.
This is the only file I am able to get into within my file thingy, so I was wondering if this was the correct file and if so, what do I do with it. I am no wizard with computers, in fact I'm useless.
-Xmixed mixed mode execution (default)
-Xint interpreted mode execution only
-Xbootclasspath:
set search path for bootstrap classes and resources
-Xbootclasspath/a:
append to end of bootstrap class path
-Xbootclasspath/p:
prepend in front of bootstrap class path
-Xnoclassgc disable class garbage collection
-Xincgc enable incremental garbage collection
-Xloggc: log GC status to a file with time stamps
-Xbatch disable background compilation
-Xms set initial Java heap size
-Xmx set maximum Java heap size
-Xss set java thread stack size
-Xprof output cpu profiling data
-Xfuture enable strictest checks, anticipating future default
-Xrs reduce use of OS signals by Java/VM (see documentation)
-Xcheck:jni perform additional checks for JNI functions
-Xshare:off do not attempt to use shared class data
-Xshare:auto use shared class data if possible (default)
-Xshare:on require using shared class data, otherwise fail.
The -X options are non-standard and subject to change without notice.