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.