It sounds like moving the files from one profile to another has lost or
corrupted some files and folders that FrontPage uses to determine if a
folder is a website or not. FrontPage web sites should be Published
between locations, not copied (I appreciate that this may not have been
possible).
First, download FP Cleaner from
http://www.95isalive.com/fixes/fpclean.htm
Run the routines that delete the hidden Web Cache files, and delete the
hidden Temporary files.
If this does not help, then this is more drastic (and assumes that your
web sites are in My Documents\My Webs folder):
These steps will remove all FrontPage meta data from your web sites.
All web sites will have to be republished completely.
Open My Documents in Windows Explorer, then search for files and folders
named _vti_*
These are hidden, system folders so set the search to look in those.
Delete these folders.
Open FrontPage, then use File->Open Site and browse to My Documents\My
Webs and open this folder. FrontPage will ask to convert it to a web
site by adding information - agree.
Look through the folders in this site, every folder that is a web site
or sub web right click and choose "Convert to web"