You need InDesign CS6 or earlier to open a PMD file. It's included in
I have InDesign CS... version 3.01 - and I'm at a standstill...
Have you tried opening one of the PM files with CS3?
If so, the result might range from acceptable to not so good. Part of it depends on the images being embedded or link, and the fonts. Sometimes the phase of the moon seems to come into play (not really, but it seems like that at times).
If you have your install for PM, you might hunt down an XP Pro computer and try installing PM on it you may have better success.
If you would like someone else to try, you would need to ZIP up the PM file(s) and upload to dropbox.com or another file sharing server and provide a link. If the files are sensitive, consider uploading them and sharing the link to download privately through the private messaging here.
Sandy Korda wrote:InDesign says it "may not support the file format, or a plug-in that supports the file format may be missing.
Is this the only file that is causing a problem? That particular error is commonly associated with trying to open a file that isn't actually the file type associated with the file extension (in other words, the file extension has been changed and it isn't really the type of file you think it is).