[GNC] Two versions, same computer

[Stan Brown (using GC 2.6.19)]

I apologize for asking a question that must have been asked before, but
I couldn't turn up answers by googling or in the archives.

Can GC 4.13 coexist on the same Windows 10 machine with GC 2.6.19? They
would be accessing separate data files in separate folders, and would
not be executing simultaneously, but I worry about preferences, reports,
most-recently-used file lists, and anything else that might get stored
in the System Registry or a fixed location.

It might be helpful to explain my use case.

I'm on the board of a small nonprofit. Our longtime volunteer bookkeeper
is bowing out, and the treasurer who will have to take over the
bookkeeping doesn't have experience with any accounting software. We
have an average of just a couple of dozen transactions a month, and the
reports we need are just the standard income statement and balance
sheet, plus transaction reports for the Income:Donors and
Expenses:Musician Fees accounts. There's no need for the software to
print checks or 1099 tax forms (we must file one 1099 for each
non-employee we make payments to), though that would be a nice plus.
    I want to put together a chart of accounts and the transactions for
the year to date in GC 4.13. If the treasurer feels comfortable with
entering transactions and pulling reports, I will install everything for
the nonprofit to her computer. All of that will be in the 4.13 and only
that version.
    But I'm keeping my own books on my computer, and they're in GC
2.6.19 and only 2.6.19 for now. (I know it's necessary to upgrade in
phases and I'm not ready to do that now.)

I suppose I could install a virtual machine for running 4.13, but that
seems like a lot of work for a short-term need. Another possibility is
the portable 4.13 install at
<https://portableapps.com/apps/office/gnucash_portable>
but I remember some discussion in this list about some reasons not to
use that.

Can I install 4.13 on my current machine without it and 2.6.19
interfering with each other, provide that they don't run simultaneously
or use the same saved reports?

-- 
Stan Brown
Tehachapi, CA, USA
https://BrownMath.com