Note: In obsolete K-Meleon 1.5.x the set-default routine is outdated, it works only up to XP-SP2 correctly.
If you're on a newer Windows and use KM1.5.x please read HERE. K-Meleon uses the Gecko rendering engine developed by Mozilla, which is also used by Firefox.
Once installed, K-Meleon automatically detects your JRE installation and no other configuration is necessary. To see if the JRE is properly installed, open Help (Old versions: The K-Meleon Loader preloads portions of the K-Meleon browser and thus allows it to launch more quickly - especially on low-end hardware.
Be aware that the K-Meleon browser keeps running as long as the K-Meleon Loader is running.