How to delete an embedded "thing"

[Matte]

Good day to all,
I have been out of the Sketchup / Layout world for a few years now.... IM BACK ! I bit rusty, but working on getting REALLY back into it! I am trying to use Layout as my new "main" presentation tool of ideas. Here is my present problem... Layout keeps crashing... I figured out that it was because I tried to import an Excel spreadsheet. So I "deleted it". But in the > Doc Setups > References > I can not delete the "unwanted info". I can edit it and delete all, but the embedded link can not be removed? Is there something I am missing ?
Thanks, Mattee

[Dave R]

If Purging in References doesn't get rid of it, it must be used in at least one spot in the document. Find that and delete it. Then you should be able to purge it.