Hello everyone,
It worked normaly for me until i tried to select a file to convert from a online tool.
I almost tried everything mentionned with things described above with the same result. No sound file dialog.
When i looked closely to the file where i saved my sounds i saw that Windows displays the informations as music files instead normal file. Windows did the changes automatically without asking.
So select the sounds folder properties last tabs there's an option called optimized folder. It's now set as music instead as document... Just put back to document and delete in DCS Editor the sound action and re add it.
The file dialog is appered again.
Hope this will work for you.