Hi EnFrance and welcome back to genealogy,     
Firstly, please confirm that      
* you have a complete  backup, of your FTM14 data on your computer?     
* does that include any media files?     
* you can access your tree(s) on that computer?     
Assuming that the answers above are "yes", "?", "yes"      
then do not worry you probably do not need a linked&online Ancestry to function,      
you just need to use FTM14 as a tree data record.     
Make your changes on the offline version of FTM14.     
Export the data to a gedcom file ( this will not contain media )     
You can then upload to something else ( say Zoompast.com ) to display online.     
Or use FTM14 as is ( offline )
Ensure that you take at least one backup of you files, before you start.