Newest Cura Version for Taz 6

Where do I download the latest version of Cura for my new Taz 6?

Here ish: https://www.lulzbot.com/cura

There is also a github repository somewhere that may have newer beta versions in it. You may also want to check out download.lulzbot.com and devel.lulzbot.com

I have a 64-bit machine but I only see a 32but version. Do you know if this works properly?

Yes, it does. It just wont use more than 3.3GB of your available ram.