It might seem odd to care whether or not a Non-Filled/Non-Stroked object opens in a file, but such an item does come in handy at times. At any rate, I can save and open a native Designer 2 file with such an object just fine. But, if I open a file made and saved with Illustrator, or a PDF created by Illustrator (the only formats I tested), the object is nowhere to be found in the document.
Running Designer 2.0.0 on Windows 10. Hardware acceleration tested in both on and off states. Sample files are attached.
Thanks!
-Joe
NOSTROKENOFILLTEST.afdesign
NOSTROKENOFILLTEST.ai
NOSTROKENOFILLTEST.pdf