After upgrade to 64 bit Java technic launcher now hangs

[Xellas]

Launcher Version: Most recent build, downloaded as of 10/7 (no build number on TechnicLauncher.exe

Operating System: Windows 7 service pack 1, 64 bit

Java Version: Version 7 build 7

Antivirus Program: Microsoft Security Essentials

Description of Problem:

Upgraded from 32 bit java that was outdated (fully uninstalled old version) then installed most recent 64 bit java install. Technic pack was working correctly before, however repeated 'out of memory' crashes were driving me crazy (about every 15-20 minutes of gameplay). After the update launcher no longer works, it gets to the "techniclauncher" splash screen but never loads the technic menu. I've backed up my world and deleted the .techniclauncher folder and reinstalled, however, now the launcher has not rebuilt the install.

UPDATE: Attempted to install the 32 bit java 7 build as well, rewiped .techniclauncher and reinstalled again, same situation. It creates the .jar file, gets the splash screen up, then hangs so badly I have to use task manager to kill java to get the splash screen to go away.

UPDATE ROUND 2: Got some help from Lothos on the IRC, on his suggestion I've wiped the .techniclauncher folder entirely, uninstalled all versions of java on the computer, wiped the link in the enviromental system variable "path" to Java, and then rebooted the machine, reinstalled both 32 and 64 bit Java (version 7 update 7) and attempted a clean install of Technic... no luck, still hangs on the splash screen before the menu.

FINAL UPDATE: Fixed thanks to Jorcen's expert advice! Give the man a thumbs up he's great, problem was my firewall silently blocking outgoing packet requests without actually blocking the executable itself (which I'd whitelisted as a preliminary step). Whitelisted the actual IP address for the tekket servers and everything is purring along now.

Error Messages:

None, total hang.

Error Log:

[09:02:55] [sEVERE] ------------------------------------------

[09:02:55] [sEVERE] Launcher is starting....

[09:02:55] [sEVERE] Launcher Build: '1.0.1.3'

[09:02:55] [sEVERE] Allocated 910.25 Mb of RAM

[09:02:55] [sEVERE] Java VM: '1.7.0_07-b11'

[09:02:55] [sEVERE] OS Version: '6.1'

[09:02:55] [sEVERE] Is 64-bit: 'true'

[09:03:06] [sEVERE] java.lang.NullPointerException

[09:03:06] [sEVERE] at org.spoutcraft.launcher.MirrorUtils.getMirrorUrl(MirrorUtils.java:30)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.MirrorUtils.getMirrorUrl(MirrorUtils.java:76)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.MD5Utils.updateMD5Cache(MD5Utils.java:71)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.loadLauncherData(LoginForm.java:360)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.<init>(LoginForm.java:133)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.Main.main(Main.java:194)

[09:03:06] [sEVERE] All mirrors failed, reverting to default

[09:03:06] [sEVERE] java.lang.NullPointerException

[09:03:06] [sEVERE] at org.spoutcraft.launcher.MirrorUtils.getMirrorUrl(MirrorUtils.java:30)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.MirrorUtils.getMirrorUrl(MirrorUtils.java:76)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.YmlUtils.downloadYmlFile(YmlUtils.java:45)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.YmlUtils.downloadRelativeYmlFile(YmlUtils.java:24)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.updateModPacksYMLCache(ModPackListYML.java:82)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.getConfig(ModPackListYML.java:72)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.getModPacks(ModPackListYML.java:108)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.<clinit>(ModPackListYML.java:60)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.loadLauncherData(LoginForm.java:361)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.<init>(LoginForm.java:133)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.Main.main(Main.java:194)

[09:03:06] [sEVERE] All mirrors failed, reverting to default

[09:03:06] [sEVERE] Exception in thread "main"

[09:03:06] [sEVERE] java.lang.NullPointerException

[09:03:06] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.getAllModPackResources(ModPackListYML.java:186)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.loadLauncherData(LoginForm.java:363)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.<init>(LoginForm.java:133)

[09:03:06] [sEVERE] at org.spoutcraft.launcher.Main.main(Main.java:194)

[09:16:16] [sEVERE] ------------------------------------------

[09:16:16] [sEVERE] Launcher is starting....

[09:16:16] [sEVERE] Launcher Build: '1.0.1.3'

[09:16:16] [sEVERE] Allocated 910.25 Mb of RAM

[09:16:16] [sEVERE] Java VM: '1.7.0_07-b11'

[09:16:16] [sEVERE] OS Version: '6.1'

[09:16:16] [sEVERE] Is 64-bit: 'true'

[09:16:30] [sEVERE] java.lang.NullPointerException

[09:16:30] [sEVERE] at org.spoutcraft.launcher.MirrorUtils.getMirrorUrl(MirrorUtils.java:30)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.MirrorUtils.getMirrorUrl(MirrorUtils.java:76)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.MD5Utils.updateMD5Cache(MD5Utils.java:71)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.loadLauncherData(LoginForm.java:360)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.<init>(LoginForm.java:133)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.Main.main(Main.java:194)

[09:16:30] [sEVERE] All mirrors failed, reverting to default

[09:16:30] [sEVERE] java.lang.NullPointerException

[09:16:30] [sEVERE] at org.spoutcraft.launcher.MirrorUtils.getMirrorUrl(MirrorUtils.java:30)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.MirrorUtils.getMirrorUrl(MirrorUtils.java:76)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.YmlUtils.downloadYmlFile(YmlUtils.java:45)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.YmlUtils.downloadRelativeYmlFile(YmlUtils.java:24)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.updateModPacksYMLCache(ModPackListYML.java:82)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.getConfig(ModPackListYML.java:72)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.getModPacks(ModPackListYML.java:108)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.<clinit>(ModPackListYML.java:60)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.loadLauncherData(LoginForm.java:361)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.<init>(LoginForm.java:133)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.Main.main(Main.java:194)

[09:16:30] [sEVERE] All mirrors failed, reverting to default

[09:16:30] [sEVERE] Exception in thread "main"

[09:16:30] [sEVERE] java.lang.NullPointerException

[09:16:30] [sEVERE] at org.spoutcraft.launcher.modpacks.ModPackListYML.getAllModPackResources(ModPackListYML.java:186)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.loadLauncherData(LoginForm.java:363)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.gui.LoginForm.<init>(LoginForm.java:133)

[09:16:30] [sEVERE] at org.spoutcraft.launcher.Main.main(Main.java:194)