Buy page broken?

I tried to go through the purchase process and ran into this page:

We've happened upon a bit of a problem...

500 (Internal Server) Error

...that we're working furiously to correct. Things will be up and running again soon. Thanks for your patience.

Reluctant to try running it through again because I don't want to be double charged, any ideas when it'll be back up?

I just checked the purchase page and it works fine. I also checked the transactions and I don't think you have been charged.

I got it to work. Quick question, I didn't see it on the terms, can I install this one multiple machines? i.e. home machine and work machine?

Thanks!

Yes you can. The license is user base.