Ancestry must have some way of curing this memory issue, as always not enough people complaining.
BTW - unless you're talking about FTM only using up to 2 GB, then I have to disagree - 32 bit machines can only access/address about 3.5 GB, having a 64 bit machine means that the processor can access over this low memory limit.
I also misquoted the 64 bit machine memory - its 10 GB, with 6.5 available and 4.5 free. FTM has crept up to 400 MB (private working set) with 513 MB (working set sharable).
Surprisingly both Outlook and IE10 combined are using less memory than FTM.
Thanks for the tips.