hfss Erorr message

hello every body:

I have some WinRAR ZIP files downloaded from internet contained HFSS folders
I tried to execute them but i got this error message from hfss v9 ...Can any one help me to solve this problem...??

is it because the project i tried to open belong to later version (hfss 11.......)


The message is

[[[[The project E:/FSS/wave_ridge.hfss is locked.
if the project is currently in used. recovering will cause data corruption
or software failure. Do you want to continue..????]]]]]]]]]]

I got this messege when HFSS is not properly closed in previous session.
Do one thing.
Make backup of the project.
& open the project by saying yes.
I the design will be open & you have to resimulate.
:)