How to remove outdated Referenced Plan Files? (Showing up in Latest Revised Plan File)

[gravattedesign]

I have several earlier versions of plan files showing up in the Referenced Plan File of my latest revision. Is there a way to remove these older referenced plan files so they don't load and show up in the Project Browser? I am guessing that the more reference files loaded per CA session could affect performance.

I have opened each referenced file to purge referenced plans with no success.

 

Thank you for any insight.

[SHCanada2]

show in the broswer or are in the plan as a reference?. plan is below.

 

There can be many plans in the browser. it does not mean they are linked/referenced. I keep backup copies there that are not linked to anything(other than being part of the project as an un referenced file)

Edited 7 hours ago by SHCanada2