Well actually I upgraded from 3.2.2 to 3.2.8. So it's a big jump.
However, I see now that after the upgrade, in the extensions panel, the extensions that are incompatible are marked in red. So I guess the ACP automatically lets you know which extensions are incompatible and need to be upgraded.
So I should just delete those extension files and replace them with the upgraded versions? Without deleting the data right? Why doesn't the data need to be deleted too?
Also, what if the extension is marked in red as incompatible, but the author of the extension didn't update their extension? Should I just not use it then? What if it still appears to work ok? Would it be worth it to take the risk of continuing to use it if it seems to work fine?
Thanks again for your help.