Edit Net Properties line style by group

I have a bunch of nets that had there line style and line width manually changed, by right clicking each net and hitting edit net properties.

I would like to now go in and change them all back to default. I thought I could group edit the net properties but it won't let me. I also tried to do a Flat Net Properties export and modified the export file and then did a properties import.

It imported but gave me the following. I saw a note about using tcl to do this but it requires selecting the nets of interest. My nets span multiple pages and I'm not sure that I can select them all.
Maybe someone knows of a way and then I could run the tcl script on them.

ERROR(ORDBDLL-1093): This attribute is not editable as a property.
ERROR(ORDBDLL-1093): This attribute is not editable as a property.

"FLATNET:N5025907"    "45996"    "Default"    "<null>"    "<null>"    "False"    "Dot"    "Wide"    "45996"    "N5025907"    "<null>"    "<null>"    "<null>"
"FLATNET:N5025935"    "45988"    "Default"    "<null>"    "<null>"    "False"    "Dot"    "Wide"    "45988"    "N5025935"    "<null>"    "<null>"    "<null>"