ZBrushCentral

Old zbrush 3-4 files won't open in 4.7+

I have some old zbrush files from zbrush 3. They won’t open in the latest zbush. There any program that will open the ztl file to be re-saved? Some will open… I think they are from zbrush 4.2 or older and those ones are pixelated really bad with the mesh shooting out everywhere.

A lot of the files have ? as icons as well. Not sure why.

Appreciate any help on this.