Revert "use partial index for performance"

This reverts commit 0703f06afb2e068738d663b5f8a8ff83fb7b23fe.

Reason: Restore older tool recognizing xx.mmb as a database.

To fix affected databases, all added indexes need to be removed. This MMEX version will replace all necessary, indexes.
Merge pull request #137 from stef145g/master

Revert "use partial index for performance"