Gotta love the search feature...
I have been getting the 'run-time error 380' message, as well.
The default layout works fine as does "Cabinet Layout (640x480)" by SteveH from screenshotarchive.com.
However, "Cabinet Layout with Help (both 640x480 & 800x600)" from the same site give the 380 error message when attempting to launch Mamewah.
The layouts are visible through the Mamewah setup program, but they will not run.
Any ideas Min?