In Version 2.23 there was an option to keep the free version installed.
I've just found that there is a v2.24 (Mind you the updates page still lists 2.18 as the most recent), so I installed 2.24 and the first thing it did was told me that my trial period had ended, gave me the list you mention, but didn't have the keep free version option. So I cancelled the uninstall and got the free version running anyway.
Few bugs in the system.
I don't need the stuff you get if you pay for it, but I'd pay for the program if Accounts/Invoices/Inventoria were all connected, and had a BAS facility, since the ATO is abandoning their free e-Records I'm now looking seriously for something that'll help me out with BAS!