Install old version of chrome

I accidentally hit update for my apps this morning and now one website i usually go to will not let me open its links. It for some reason trys to open a link to a facebook page which is blocked at work. when i use IE i do not have this issue and can then copy those links into chrome and they will work then. I use chrome at work incognito so it wont keep all my cookies, etc.

I find a download file for an older version of chrome portable but when I try to install it, it starts installing and then downloads the latest version automatically. how can i just use an older version, like one from march?