Separate subscription for Astronomy Club

I'm also the Treasurer of a small non-profit club.

For now, the club's records are in it's own Q data file. Your club's finances should be in a separate file also.

If, at some future point, I'm no longer the Treasurer, it will be my successor's decision as to continuing Q or not. At which point the subscription question will come up … but for now, I don't see any reason to decide.

BTW, my predecessor used a "general public license" product, so I believe that each Treasurer should use what they're comfortable with … assuming that the other officers/Board concur.

If you decide to go with a separate license, here is some advice on using it and your license on the same computer.

You already have both editions of Quicken installed. There is only ONE subscription Quicken program, the license decides which features (edition) are available.
You can switch between editions by going thru EditPreferencesQuicken Id, "login as different user".
To prevent hiccups in your separate data files, make sure that they are both uniquely named and switch between them using this process.
Create a dummy data file named something like go_between.qdf with no accounts in it, it is just for transitioning between the two Quicken IDs.
Now, you do NOT want to open your personal data file while the Quicken program is setup for the Club's ID and the same holds true for opening the Club's data file with your personal ID.
So, that is where the dummy data file comes into play. Lets say you are using your data file and now want to work with the Club's data file.

1. Open the dummy data file using either FileOpen Quicken file or picking it from the recent file list on the File menu.
2. Do EditPreferencesQuicken Id and then "login as different user" using the Club's ID.
3. Open the Club's data file using either FileOpen Quicken file or picking it from the recent file list on the File menu.
4. Do what ever you needed to do.

Now, when you want to work with your personal data file, follow the same procedure except substitute your personal data file and Quicken ID where you used the Club's information.
I suggest always returning the state of registration of Quicken to your personal Quicken ID and only have it in "Club mode" when it needs to be so that you don't inadvertently open your personal data file with the Club ID which would require you do do steps 1 & 2 again as 5 & 6 using personal ID.