Is It Possible to Edit/Use [a Wintek Hiwire project with KiCad]?

[paulvdh]

If you have gerbers, then you may be able to reverse-engineer them into a KiCad project:

Reverse engineering KiCad project from Gerber files

The goal of this reverse-engineering tutorial is to re-create a complete KiCad project from partial information assuming the only information available is a schematic in some readable, (but not EDA form, such as a .pdf or a .png picture), and a set of gerber files. The Gerber files will create a PCB with much PCB information missing, however, using this method is easier than re-designing a PCB from scratch, and can also be extended to any other program that creates Gerber files. What is “resc…

But back then, in the DOS age, there were a lot of strange Gerber dialects.
KiCad also has the ability to load a background image via: PCB Editor / Place / Add Image, and this is a useful aid during re-creation of any PCB.

For the schematic I do not see any options except a complete re-entry. But you have to have it in some human readable format, be able to run that old program in some dos (emulation) box, or, as a last resort, re-create it from the PCB itself. This last option is significantly more work.