OBJ Export Plugin fails to Export in Rhino 8 SR18 and SR19

In Rhino 8 SR16 you could export our gem files as obj nurbs format, using the export selected command.

After updating to the latest Rhino 8 SR18 build, the OBJ Export Plugin no longer exports.

Here is the file for reference, that I was trying to export from:
Exporting objects as NURBS in OBJ Files in Rhino 8 SR18 not working.3dm (597.0 KB)

I updated to the latest SR candidate SR19 and this is still broken.

How can we recommend to our users to download SR16?

Hi Jason -

Thanks for that file. I see that it also crashes Rhino when the block instance is exploded and then the polysurface is exported.
I’ve reported this regression: RH-87058 File IO: Export OBJ Crashes
-wim