I had an issue with 10 and went through deleting the .cdx files and that didn't work for me either. I talked to the tech and he had me delete these two files:

Delete the Thumb1.fpt and Thumb2.fpt (not all the fpt files) from the "C:\Documents and Settings\yourusername\Local settings\Application Data\ACD Systems\Catalogs\100\Default"then test if you can optimize the database properly.

Since you have 9 it would be 90/default. This is the same place that the .cdx files are.

This worked for me. If you feel like having a safety net then copy those files someplace else befroe deleting so you can put them back if you need to.

I can't scrap without ACDSee anymore. My stash is too big to find anything.

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Serena Thomas