Missing Block Definition File DIalog | Possible bug

When encountering a missing block definition file Rhino present a dialog box saying "A linked block definition cannot find a file named /Users/xxxx/Documents/xxxx/someblock.3dm
Do you want to browse for the file?

If pressing the "No"button a file open dialog is nevertheless presented to the user.

Thanks for the report. This will be fixed in the next WIP release.