WinUAE 64-bit - crashes when you open a Win10 file dialog
 

Steps to reproduce:

1) Open WinUAE.
2) In Properties window, go to Hardware/Floppy Drives.
3) Click on the [...] button to the right of the DF0: entry.
4) A Win10 file selector window will pop up for a few seconds, then you get a "WinUAE has stopped working" error dialog, with only the option to "Close program."

This will actually happen on any [...] button in the WinUAE interface, but I'm giving this example for testing purposes.

As it stands, the only way to select a file is by, instead of browsing using the [...] button, typing the whole path/file in manually.

Reproduced this with both 3.2.2 and 3.4.0 64-bit versions. 32-bit versions of both seem to work fine.