Ops my bad. i forgot to include migration data. This will only work on cables already placed. all cables in invantories will be fibers still, nothing i can do about that.
If you want to continue your save go into the Moshine zip file. Inside the Moshine folder create a new folder called "migrations"
Inside that create a json file. Does not matter the name of that file but probably call it "Moshine.0.2.2.json"
Inside that json file add the following lines.
{
"entity":
[
["optical-fiber", "optical-cable"]
]
}