Yup with Java 7u51 and after, ALL applets and webstart applications must be signed and the permissions attribute set. These are easily google-able though so it’s pretty easy to sign your application and set the permissions.
The website appears to be down. I love that GUI!!!
I just tried the links:
http://groboclown.net/games/java4k-launcher/java4k-launcher-win32-nojre.zip
http://groboclown.net/games/java4k-launcher/java4k-launcher-win32-jre.zip
http://groboclown.net/games/java4k-launcher/java4k-launcher-nojre.zip
https://pikacode.com/groboclown/java4k-launcher/
and they seem to be working for me. Let me know which site you’re having difficulty with, and I’ll investigate the issues.
Woah, I’m surprised you got on! I was having the problem with http://Java4k.com
It’s working now, did you change anything? It might have been the fact that my internet shut of earlier.