After being forced from SuperCalc3A spreadsheets in the 1980s to Lotus Symphony spreadsheets in the 1990s, and then Symphony Spreadsheets to Windows Excel in the 2000s, I can certainly sympathize with you. Unfortunately time marches on in the world of software and the old is eventually tossed to the side of the road. (Even the old Appleworks from the 1980s on an Apple II did just about all a person ever wanted to do on a computer - word processor, database, and spreadsheet in one program.).
At any rate, you may wish to download the FTM2005 Starter Edition. See here:http://help.ancestry.com/app/answers/detail/a_id/3673/~/open...
If you don't make use of fact notes or have other differences with ancestry trees, you can also upload v16 to a tree and then
1) start up FTM2014
2) Go to Plan Workspace - New Tree
3) Choose to download an ancestry tree directly into that FTM2014 (without using a gedcom)
I run FTM2014 on Windows 7 with 70,000 persons with only the "normal" problems. (ie out-of-memory, occasional crashes, slow operation from time to time, etc)