Go to XML Editor in INK.
Select g:557
Then Object Ungroup, Ungroup.
Select copper1, go to id, change to copper0 and set.
Still on copper0 go Object Group and name that copper1.
Extras are Ungroup g:511 twice, so silk is the only one left.
Go into silk group and delete - red box in XML toolbar - all but path6 and g:505.
Save as plain svg and load back into FZ PCB Part Edit.