Github app for Windows problem

Hi. I need help. Default application for Windows by github don't have proxy support. I'm wrote .gitconfig into user folder but that didn't help me. I did so…

$ git config --global http.proxy http://proxyuser:proxypwd@proxyip:proxyport
$ git config --system http.sslcainfo /bin/curl-ca-bundle.crt

My .gitconfig

[gui]
recentrepo = D:/git
[user]
name = GangrenaGastrit
email = my_email
[github]
user = GangrenaGastrit
token = my_password
[http]
proxy = http://proxyuser:proxypwd@proxyip:proxyport
[core]
proxy = http://proxyuser:proxypwd@proxyip:proxyport
gitproxy = http://proxyuser:proxypwd@proxyip:proxyport