Go to this link and Download your OS Specific Build:

http://www.sublimetext.com/3

Mac OS X

Open Terminal and Type the following:

1. cd /Applications/Sublime\ Text.app/Contents/MacOS/
2. Now Type  “vim Sublime\ Text″
3. Now Change to hex mode in vim by doing this =>  “:$!xxd”
4. Now we will do find and replace ->> “:%s/5BE509C33B020111/5BE509C32B020111/g”

Now open the sublime and enter the below licence key , it should work like a charm.

WINDOWS

For x64: After install, open sublime-text.exe with hex editor. Find and replace “33 42″ with “32 42″. Save and using this license key to register:

You should copy from Begin License till End License.

UBUNTU:

Follow these to register sublime text 3 in ubuntu
1.Install ghex editor.(in terminal,enter “sudo apt-get install ghex”)..without the quotes.
2.In terminal enter “cd /usr/lib/sublime-text″
3.In terminal enter “sudo ghex sublime_text” & enter your password
4.In open ghex window,navigate to Edit>Replace.
5.In the find string section enter 33 42
6.In the replace with section enter 32 42
7.save and exit.