[Caution opinion ahead]
"Just hang on for 10 mins I'll do the wages after I install/upgrade my MYOB, shouldn't be too difficult right?"
...or perhaps not, for a fairly universal bit of software MYOB seems to be intent on making things as hard as possible and not playing by the established software rules, you really need to plan this out and talk to IT support if you're not confident to do it.
Things to consider:
MYOB Accountright or MYOB Accountright?
MYOB Accountright plus v19.10 is a completely different product to MYOB Accountright 2014.3
Whack-the-mole
MYOB seam be having a laugh at me, firstly they hide the data file is some obscure location on the "local" PC that doesn't follow the normal windows rules (not the server where all my other important data resides). Then they keep putting it back there after every upgrade and now they seem to be moving it around like a game of whack-the-mole, make sure your data is being backed up and will still be backed up after the upgrade.
How many versions of MYOB do I really need?
With the traditional install of MYOB each version upgrade just adds another on top I have customers that have 5 or 6 versions of MYOB installed, "No not those 5 MYOB icons this other special one here".
Sure we will let you install the upgrade even as a non admin [said with a straight face]
"Just enter the administrator credentials when prompted and everything will be fine!!". But the upgrade may not work properly and you have to manually uninstall two versions and reinstall one again. MYOB's solution make everyone an administrator. Welcome to 1999, what do you say malware, viruses ransomeware? don't worry you will be fine. [note that's humour you probably won't be fine]
No you don't need the server version, oh hang on you do:
With MYOB Accountright 2014 you could just install the software twice on 2 different machines and then share the data from one but since the Accountright 2014.1 or later upgrade you need the sever version on the computer that your sharing it from.
Now, I don't confess to be an MYOB expert so perhaps that's the problem but wow, really MYOB?