There is no error log. Also i mean splash screen by title. ("Mythruna" (a text with image overlay and stroke effect) and under that "Role Playing Game" text)
I'll try latest versions until its works. And you can understand by changelogs problem's source.
Mythruna-Windows -Works Perfectly (First Release)
Mythruna-2012-02-16-Windows -Doesn't Works
Mythruna-2012-02-14-Windows -Doesn't Works
Mythruna-2011-12-23-Windows -Doesn't Works
Mythruna-2011-12-18-Windows -Doesn't Works
Mythruna-2011-12-17-Windows -Doesn't Works
Mythruna-2011-12-12-Windows -Doesn't Works
Mythruna-2011-11-21-Windows -Doesn't Works
Mythruna-2011-10-17-Windows -Doesn't Works
Mythruna-2011-10-10-Windows -Doesn't Works
Mythruna-2011-10-02-Windows -Doesn't Works
Mythruna-2011-09-30-Windows -Doesn't Works
Mythruna-2011-09-29-Windows -Doesn't Works
Mythruna-2011-09-22-Windows -Doesn't Works
Mythruna-2011-08-30-Windows -Doesn't Works
Mythruna-2011-07-16-Windows -Doesn't Works - Creates an error log and size is "92.033 KB" (Same with others)
Mythruna-2011-07-14-Windows -Doesn't Works - Creates an error log and size is "92.033 KB" (Same with others)
Mythruna-2011-07-09-Windows -Works but singleplayer button doesn't do anything also freezeswithout error when connecting to default server with writing only user id without password. / Crashing when press options button.
Mythruna-2011-07-05-Windows -Works but singleplayer button doesn't do anything also freezeswithout error when connecting to default server with writing only user id without password. / Crashing when press options button.
Mythruna-2011-06-27-Windows / Works but singleplayer button doesn't do anything also freezes without error when connecting to default server with writing only user id without password. / Crashing when press options button.
Mythruna-2011-06-24 / Works but singleplayer button doesn't do anything also freezes without error when connecting to default server with writing only user id without password. / Crashing when press options button.
Mythruna-2011-05-23 /
SP Works without problem but freezes without error when connecting to default server with writing only user id without password. / Crashing when press options button.
Mythruna-2011-04-30 /
SP and Options works without problem. / Freezes when i press connect.Mythruna-2011-04-20 / SP and Options works without problem. / Freezes when i press connect.
-BUILDS between 04 - 02 months i think i don't need to download. This list is enough.-Mythruna-2011-02-02/ Everything Works Fine.
Mythruna-2011-02-20/ Works Fine except world loading too slow.
All error logs are same. First 11 line:Uncaught exception from thread:Thread[main,5,main]
java.lang.ExceptionInInitializerError
at mythruna.MainStart.main(MainStart.java:71)
Caused by: org.progeeks.util.InspectionException: Error calling setter[ set(invertMouse, false)]
at org.progeeks.util.Inspector.set(Inspector.java:903)
at mythruna.ClientOptions.set(ClientOptions.java:160)
at mythruna.ClientOptions$BooleanPref.loadValue(ClientOptions.java:376)
at mythruna.ClientOptions.loadPrefs(ClientOptions.java:121)
at mythruna.ClientOptions.<init>(ClientOptions.java:76)
at mythruna.ClientOptions.<clinit>(ClientOptions.java:24)
... 1 more