I would definitely upgrade to FTM2012. There are dozens of updates and changes from FTM2011 - even not counting the sync feature (which I don't use either).
What some users do, including me, is to identify our file names with the version that file is associated with. For example, before I upgraded to FTM2012, my file was xxx2011.ftm and was in:
FTM2011 Data Files
....xxx2011.ftm
....xxx2011media (folder) - with contents.
I then created new folders:
FTM2012 Data Files
.... xxx2012media (folder with contents)
I copied xxx2011.ftm to the 2012 file and changed the name in Windows explorer and also copied all of the contents of the media folder.
I then brought up xxx2012.ftm in FTM2011 and made sure I had everything - the number of individuals agreed, sources, images, etc. I also went into media and used the FTM edit to find unlinked images and told FTM to find any it found.
I then exited FTM2011 and installed FTM2012 and told it to open the file xxx2012.ftm. That file will be changed by FTM2012 and cannot be read by earlier versions.
I have the data files associated with each version of FTM for the past 10 years on my hard disk.
What some users do, including me, is to identify our file names with the version that file is associated with. For example, before I upgraded to FTM2012, my file was xxx2011.ftm and was in:
FTM2011 Data Files
....xxx2011.ftm
....xxx2011media (folder) - with contents.
I then created new folders:
FTM2012 Data Files
.... xxx2012media (folder with contents)
I copied xxx2011.ftm to the 2012 file and changed the name in Windows explorer and also copied all of the contents of the media folder.
I then brought up xxx2012.ftm in FTM2011 and made sure I had everything - the number of individuals agreed, sources, images, etc. I also went into media and used the FTM edit to find unlinked images and told FTM to find any it found.
I then exited FTM2011 and installed FTM2012 and told it to open the file xxx2012.ftm. That file will be changed by FTM2012 and cannot be read by earlier versions.
I have the data files associated with each version of FTM for the past 10 years on my hard disk.