Re-indexing PDF's

In an earlier version of Scrivener, I ran into this bug (PDF’s not searchable after editing the synopsis).

The bug has now been fixed, but I still have a problem with 100+ PDF’s that are not searchable any more. Is there any way to force Scrivener re-indexing the PDF’s? Re-importing them is not a solution (will break all my references, and I will have to redo the synopsis for every PDF). The only solution I have found so far, is to manually edit BinderStrings.xml. But that is still a lot of work…

Any other ideas?