Sorry for not following up. I had forgotten I had made this thread.
@ivansc - there is no create new folder option in Reaper in certain situations. The only place I have seen where a folder is created is when creating a new project. If I render a new file and want to change the file path and create a new folder there I have to right click in the explorer dialog and this is where the crashing occurs. Besides, it's a common way in Windows of creating a new folder so the point is moot how I want to go about it. The problem is it should not cause Reaper to crash.
I don't have any Explorer addons.
Here is the crash report in the dialog :
Problem signature:
Problem Event Name: BEX64
Application Name: reaper.exe
Application Version: 4.7.7.0
Application Timestamp: 54d69429
Fault Module Name: ntdll.dll
Fault Module Version: 6.3.9600.17630
Fault Module Timestamp: 54b0e17a
Exception Offset: 0000000000087a17
Exception Code: c0000409
Exception Data: 0000000000000001
OS Version: 6.3.9600.2.0.0.256.49
Locale ID: 1053
Additional Information 1: 2f2a
Additional Information 2: 2f2ad5c0a2e3b17f1dcdbc66f3b3a241
Additional Information 3: f6c1
Additional Information 4: f6c1d4f196386140c6696f113f782ce5
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