Tekkit lite won't start

[kcoklep]

Minecraft is installed, eventhough this error message appears. Stopped working last week, used to work before that.

Launcher Build: 434
Selected Pack: null
Stack Trace:
Exception: RuntimeException
Message: Minecraft not installed for this pack: InstalledPack{info=SolderPackInfo{name='tekkitlite', display_name='Tekkit Lite', url='http://www.technicpack.net/tekkit-lite', icon_md5='aefa89c377dcb217fdf99988f6e25b8f', logo_md5='4dc44bd7a08fa76f3e619587f189f8eb', background_md5='5a4592cb38f9bf0ca76b0667c6196b0b', recommended='0.6.5', latest='0.6.5', builds=[0.5.9, 0.5.8.1, 0.5.7, 0.5.6, 0.5.5, 0.5.4, 0.5.3, 0.5.2, 0.5.1, 0.5.0, 0.6.0, 0.6.1, 0.6.2, 0.6.3, 0.6.4, 0.6.5], solder=net.technicpack.launchercore.restful.solder.Solder@18adbb30}, name='tekkitlite', platform=false, build='recommended', directory='%MODPACKS%\tekkitlite'}
Trace:
net.technicpack.launchercore.launch.MinecraftLauncher.buildClassPath(MinecraftLauncher.java:199)
net.technicpack.launchercore.launch.MinecraftLauncher.buildCommands(MinecraftLauncher.java:107)
net.technicpack.launchercore.launch.MinecraftLauncher.launch(MinecraftLauncher.java:56)
org.spoutcraft.launcher.InstallThread.run(InstallThread.java:76)

System Information:
Operating System: Windows 8
Operating System Version: 6.2
Operating System Architecture: amd64
Java version: 1.7.0_51 64 bit
Total Memory: 61 MB
Max Memory: 951 MB
Memory Free: 17 MB
CPU Cores: 1