I'm pretty sure your profile auto updates, but if you're using heromodpack (aka liteloader) it won't, you'll need to delete your .minecraft folder and update it that way.
and here's a way to get heromodpack to 1.6.4 by Dreadniah (im too lazy to quote)
temporary 1.6.4 instructions
Step 1 -
Download this folder of all the mods and crap I put together, this has everything except minecraft.exe
Step 2 - If you don't know how to manage the profiles, just delete your .minecraft folder and rerun minecraft, log in and get to the menu then exit
Step 3 - Install forge using minecraftforge-installer
Step 4 - Run Liteloader-installer, MAKE SURE TO "CHAIN TO FORGE"
Step 5 - Move the "mods" folder into your .minecraft folder (includes rei's minimap, macromod, optifine, tabbychat, statuseffect/armorstatus gui)
Step 6 - Run minecraft and use the LiteLoader profile
As always, HeroMod itself (mana bar, party frames) isn't updated
I've tested this and it works for me, feel free to post questions
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Hope this helps