gtk.zip file download issues

[V S Rawat]

I downloaded latest version, and found that it was downloading 10+ MB 
GTK.zip which took a long time.

However, I could not find where it stored the downloaded file so that 
I save that safely so that I don't need to re-download it if I format 
my pc. Where does it save it?

It is suggested to ask for location to save the downloaded file and 
store it there and run from there. Or, providing a link from where 
user can download and install gtk.zip so that we can save it at some 
known place.

--
My previous version of pidgin installer was already having gtk in the 
zip file. If I install that, would the new pidgin run on that instead 
of downloading afresh?

Thanks.
--
Rawat