DR17-Studio; Cannot add video files (.braw) to media page

Hi,
Unfortunately I cannot add video-files anymore to the media page because some are not visible in the media storage window anymore. The problem seems to revolve around braw.-files. MOV-files are always visible.
Sometimes all braw-files from a disc-folder are visible, sometimes none. The problem applies to all hard-discs (not one in particular). When I try to drag and drop the braw.-files from windows-explorer directly into the media page it does't work either. Cannot tell if the problem already existed before or after the latest DR17-update.
Does anyone have an idea what may be wrong?
Thanks in advance.
Win 10pro; DR 17.2.1 (newest version -> update from Wednesday)
Unfortunately I cannot add video-files anymore to the media page because some are not visible in the media storage window anymore. The problem seems to revolve around braw.-files. MOV-files are always visible.
Sometimes all braw-files from a disc-folder are visible, sometimes none. The problem applies to all hard-discs (not one in particular). When I try to drag and drop the braw.-files from windows-explorer directly into the media page it does't work either. Cannot tell if the problem already existed before or after the latest DR17-update.
Does anyone have an idea what may be wrong?
Thanks in advance.
Win 10pro; DR 17.2.1 (newest version -> update from Wednesday)