I am guessing that you really mean FTM2011 and FTM2012. Version 11 is very different then FTM2011.
If you continue to have "freezing" issues,
Please go to the Knowledge Based website:http://ancestry.custhelp.com/
And enter crash into the Keyword Search and click on Search. This will bring up a list of Knowledge Based articles based on your version of Windows. Please follow the instructions, based on your version of Windows. As you go, please make note of what you see, what you did, any error messages, so that IF that article doesn't resolve this, you can post your findings here and we can go from there.
How large is your Family File?
How much Free Disk Space do you have on that PC??
How do you Access the Internet?