I have a .indd file that I am trying to open in CS4 and I get a window that pops up with a long list of plugins I need to update or update to newer software version. The file was created by a colleague of mine in CS4 on their computer. She has been trying to open that file again as well and has been receiving the same message about updating plugins. Can anyone please shed some light on this for me? Thanks!
This really, really sounds like she accidentally updated that file with a newer version of InDesign. Try my script in [Ann] Identify Your InDesign File - this will tell you the version it was last saved with.