I did try to follow this guide:
https://vimeo.com/132559209 [vimeo.com]
When Houdini LIcense Administrator is open i click also File >> Install Licence
and i enter my e-mail and password (same as i use here to log in)
But i get an error:

I just purchased Indie today and get the same error. I sent an email to SideFX Support in regards to this.

Lol! After sending an email to support I discovered an email in my inbox containing a different password to use. This password along with my email addy worked! Check your email from “License Manager” which will have a different p/w than what you registered for the forum and such.

For anybody still looking for that email, look for email from ‘licensemanager@sidefx.com’