Move X8 to new PC

We have X8 on several PCs here at work, and one of those computers has officially reached Retirement Age and will soon be replaced.  All of our installs of X8 were downloads - we don't have physical media like a DVD.  Is it even possible to move an install/license to a new PC without an install DVD?

If not and I have to buy another install, is X8 still available?  If I put 2017 on this new computer I know I'll struggle to remember to save everything down to X8 for use on the other computers.

Thanks,

John