how to avoid being Whipsawn on Quickbooks versions

Is there a way to enable older (2014 Quickbooks) to allow download of a bank register? I switched to online Simplestart. It now does not have a Purchase order feature (it has been conveniently removed by Quickbooks) A little history... I have been a Quickbooks user for 20 years.  I have a very simple business consisting of small sensor sales and some consulting.  I can't afford $40-$60 a month.  About $10 per month is about right.  I used to spend $200 for Quickbooks that would last me about 3 years.   What accounting software does not have purchase orders as a BASIC OFFERING??? Quickbooks on line (of course after I already committed to the on-line version).  Am I missing something, but WHO does not need to purchase material from another company???  Is there a bookkeeping package that has purchasing, invoicing (billing), checking (including downloading from my bank) and simple reports?  AND that does not cost more than $200 and will last at least 3 years before requiring an update (Quickbooks will not download bank info after 3 years).   I started with Quickbooks desktop for PC.  After getting a Mac about 8 years ago, I considered the Mac version, but thought better of it due to lack of features and wanting support from accountants who used the PC version.  I started using Parallels to enable me to use a virtual PC and still use the PC version.  About a year ago I considered the Mac version, but was told it was being discontinued.  I was pointed toward the on line Quickbooks.  It had the things I need:  Purchasing, invoicing (billing), checking (including downloading from my bank), simple reports The present online service I have is Quickbooks Online Simple Start.  It was fine when I first started the online service and it had purchase orders.  There was one common desktop feature that was missing:  The vendor's PO number in the printed invoice.  Hard to believe since it was always on the desktop version. BUT Quickbooks removed the purchase order feature. I do not trust cloud based products at all anymore. Not only can the developer change the look and feel of a program at-will without notice, but they can eliminate features as has happened to me.   My question remains:  Is not a PO to a vendor so common that it should be in ANY accounting software by default.  I can generate one from WORD (and I was forced to do so today), but why??