I started playing minecraft with mods a few weeks ago but my forge is too old, and do not know how to update it

 

(It was translated by google,sorry for the grammatical errors)

Go to http://www.minecraftforge.net/forum/ (the home page of this site), click Releases, choose the topic with the version of Forge you want (Probably 6.5.0 for Minecraft 1.4.6), then click the universal link. If you actually want to mod yourself with forge, I recommend you look up Wuppy's tutorial on Youtube. His channel name is wuppygaming.

Just get a clean minecraft.jar file (Currently at http://assets.minecraft.net/1_4_6/minecraft.jar ) then install a new version of forge again.

OmniSapien i know it's been like 9 years but does it reset Forge when you do that?

Dont bump a 10 year old thread, none of the information here is up to date.

And no, installing Forge multiple times does not 'reset' anything. Your data is still there. Just be careful loading worlds in different versions like you would in Vanilla Minecraft.