I found v3.4.2.1573 in a korean forum while googling for older version of the avr toolchain installer.
It seem that the older installer automatically install everything into Atmel folder in program files(x86) wheras the latest installer just prompt where to extract the files to.
Atmel site didnt have any of the older version when i look over there.
I have also tried combining both 8bit and 32bit avr toolchain plus manually putting the header folder with latest atmel version, but it still wont build. Inside git shell, it says there is no make command found.
I updated Path via advance system setting, pointing to the latest version bin folder and the header folder
Another thing is that the latest version when extracted, its in a folder named avr gnu toolchain. The naming is different from the older version. I have tried with folder name changed, updating path, keeping same name, updating path etc to repeat building process. All seem not working.
With the older version, i tried changing the folder name, location of files, updating path etc. Building it all went fine.
So far thats what i have found out.