Update
I now have my shiny new laptop!
Ancestry product support advised me to download trial version of FTM 2005 and convert my old files to FTM 2005 versions (I have also seen same thing mentioned here on Rootschat). This is because latest version of FTM cannot read very old files directly so it needs an intermediate form. They converted all right. The size was about the same as original and I don't appear to have lost any information. The screens were very similar to what I was used to with the old version. But to be on the safe side and make the files more portable I also made a set of Gedcom files from them.
I had a look at the various information on the latest FTM and the link posted by Smudwhisk and although it had some good features, I didn't think I would be able to get on with it.
I downloaded the basic free version of Legacy, but it would only import a Gedcom not the FTM files (neither original nor 2005 versions) and this lost all my images. My main file is 52 Mb and contains about 3000 people as FTM file, The Gedcom was a fraction of the size. I tried to compile a new tree on Legacy - just a small one from notes I gathered on a family branch which now looks like it connects to the main tree. The main person (Charles) married in 1822 to Charlotte, had five children, left his wife then lived with another woman (Augusta) for about 15 years and had several more children. They split up at about the time Augusta had a child with another man (a professor - so he claimed). He then lived with a second partner (Louisa) and had three more children. he eventually married Louisa when Charlotte (his wife of 1822) died.
The legacy programme showed all children, not just those of each relationship, when the particular wife / partner was selected. It had a 1/2 in front of those which were not hers, but put hers first, which meant they were out of birth order. Just to add to the confusion the "professor" was married to (or lived as man and wife according to censuses) successively with three other women. I haven't even tried adding children of these unions. I can't make it compile any reports, I keep getting error message about printer not being configured. But my printer works perfectly on all other programmes. It won't even show any reports on the screen.
Yesterday I downloaded basic, free rootsmagic essentials, and so far quite impressed. It has an import directly for FTM files from 2006 and older, and my files import completely with all images (original old ones not 2005 version). The screen looks more similar to old FTM. I haven't tried it with Charles and his various ladies, but I have looked at some ancestors who married twice and had children with both wives and it lists each group separately with the wife as FTM does. There are a lot of useful features which are only in the purchased version, but if my trial continues to look good, I'll be buying the full version.