. . . . How do I download my software on a new computer without a disc drive . . . .
Assuming this is a new purchase and the computer connects to the Internet,
Download the free version from the Magix website and enter your serial number to register the software.
For the Plus or Premium versions, once the free/base version isr egisterd/activated, the extra features will be unlocked and available - Store tab, Gear icon, Download all purchased content.
If you purchased an earlier version:
Browse to the magix.com website, click the My Account icon top right of the home page and login with the email address and password you used to register the software
select My Products - there you will see you purchased version with a download link.