Can't open saved files (Plan Files) on I.D. 7.08

[Aerowoot]

I can not open saved files-I keep getting a window that says unexpected parameter 'and' then it goes to another window that says Usage:Interior Designer 7.0[/register_file_extensions][/reg][file]/register_file_extensions/reg.

I uninstalled,shutoff my McCaffe AV,reinstalled same and nothing has changed.
I use XP on a Dell XPS400 with ample storage available.

Any ideas?
Thank you,

Aerowoot