License Key Instantly Expired

I own a license of Rhino 5 for Mac and just downloaded and installed the Mac v6 WIP. Used the license key attached to the download email, but on first run it told me that this license is expired and I need to buy a license. It’s a WIP! It’s impossible to buy a license for this. I have an onsite visit for work in the morning and need to be able to save a file I’ll be working on. Please help. Thanks.

Hi - for licensing issues, please contact directly.