More than one license

Is someone here who has the same problem.
I have someone who is working for me in SEO matter. Now to do this he need a Sparkle Version and I would agree with him to send me back all files and I would upload on PLESK.
Is someone here who has this same problem and could give me a suggestion how to do it?
Thanks for any hints.

Your SEO helper would need to have their own Sparkle license, because licenses are for a single person, can’t be lended etc.

Okidoki. Thanks a lot Duncan. Appreciate