Upgrading 4.5 to 4.6beta?

Just a small question, am i able to upgrade Unity 4.5 to 4.6 without installing it to c:\program files\unity 4.6 (or something) but just in 4.5? As i look in the Update checker, it doesn’t noticed 4.6 as update.

I’m just curious, thanks.

Why don’t you want to install it in the correct folder?
It doesn’t come up as an update because it’s still in Beta.

Anyway if you want to update, just download it: Unity Editor Beta Releases

Note that if you’re in the middle of developing a game, you should back it up because it may possibly break in some ways after updating Unity.