i understand the delete all tab does what it says, but i don't think you can highlight a block of surplus universe and delete them.
As for copying across the networks file , that doesn't appear to be picked up,
when xl4 is started up the the full model list appears and says channels can not be calculated, pix below, so not sure why it wont find the replacement file.
I will start a new setup and save and then copy over that to see of it's successful .
cheers Boof63
ps installed 53 and same result after copying over networks file, it wont pickup corrected file and keeps saying the same error message as pix below.

helps to put network file in the actual show folder - partially corrected my mistake, thanks again for help