How to hide parts in Design Library?

Hi

We use the Design Library for our standard-parts.

We do not have PDM to control our files.

When we make a new version of a part, we simply save a new file with the next letter.

Ex.

19431A

19431B

How can I hide the old files, which are not longer for use?

But without deleting them, since they may still be used in old projects.

Hope somebody knows how to do this, so that we can clean up our library...

Regards Sussi

SolidworksGeneral