Buying the program from Staples is not a problem, It will not get updates during the year unless a Support package is purchased through Sage. This would affect things like payroll, EFT or any of the other add on services that can benefit the user. There is no problem with the data set as long as the same version is  purchased, Pro, or Premium All of the history would be brought forward into the new version of the data. You cannot easily move a Premium data set down to Pro to save a few dollars. If the purchase is a 2020.0 product and the client is currently running 2015 or later there should be no concern about restoring a backup if it is a Sage backup file with a .cab extension.

Just some of my quick thoughts.

I'm currently doing this, but can't register the new product because their Customer Portal Website doesn't work. I still have 4 days on my active support subscription. its interesting that the support phone wants your ID or phone number on file before you can get connected to a person. Had I purchased after my existing software expired, I might not have got past the Level one and passed on to Level 2, Where I'm still on hold...going on 1.5 hours.

Hey [email protected],

Update that I just emailed you regarding your account. I see that support added your new serial number. Look for an email from me. You should be ok to use the codes as mentioned. Please email back if after the 24th of Jan (when your current Sage Business Care plan expires) you're blocked from access your program. Think I added the lience entitlement well but usually we add it after plan expiry. Notes are on your account under Service Request#9002210276.