I have an older file with a discontinued company title block that I want to update to the current title block.  I right-click on the open drawing sheet and go to properties.  The sheet properties opens and I don't see the drwdot files in the window of available sheets.  I click browse and the drwdot files are not listed.  Only choices are .drt and .slddrt files.  The files exist as I can see them from inside Windows explorer in the network drive, the same folder that Solidworks is looking at.  My coworkers can see the files in their Solidworks program.  A setting has changed somewhere but I am clueless as to what I changed and when.

Solidworks version 2018 x64 SP2.0.