[launcher problem] Cannot launch any modpacks

[Draco FireBlaze]

Title:

[launcher problem] Cannot launch any modpacks​

Launcher Version:

10407​

Modpack:

all modpacks​

Modpack Version:

n/a​

Log Link:

http://paste.feed-the-beast.com/view/f3f28057​

Details of the issue:

I can't play FTB. When trying to launch ANY modpack (even ones I have not installed) nothing happens except the launcher spews out:

Unhandled exception in Thread[AWT-EventQueue-0,6,main]: java.lang.ArrayIndexOutOfBoundsException

Last things I did before this problem happened: I updated to launcher version 10407 and then installed the FTB Lite 3 pack. I managed to get ingame with that pack but the next time I tried to load the launcher this happened

System info:
-OS: windows 7
-Java version: 1.8.0_25

Is there a way to roll back to version 1.4.6?​

 

[Draco FireBlaze]

ahh sorry for triple post, the text box containing my ticket didn't go away when I pressed submit so I got confused.

More info about the problem: I noticed something strange about the error logs, it is complaining about

[08:15:43] [WARN] LaunchFrame.updateTpInstallLocs:690: Can't find modpack: MagicFarm2
[08:15:43] [WARN] LaunchFrame.updateTpInstallLocs:690: Can't find modpack: AgrarianSkiesHQ

I had previously downloaded these modpacks. I deleted them and the problem has disappeared for now. I should also mention that I got the modpacks to launch one time earlier by switching to java version 7 but that didn't work the following time I tried to load up FTB.