Thank you for your response.
The process I do on the GoPro Player Windows App is the following:
1 Opened a mp4 file called GH010074.MP4 and the window change its title to "GH010074.MP4". I played the video without problem, so there's a frame I liked in some part of the video and i stopped the reproduction to capture the image as jpg file.
2. On the menu bar I choose "Edit->Extract current frame" and a new window titled "GH010074.jpg" opens , the mouse pointer icon change to loading icon, after a few seconds later the app crashes and a new window with "GoPro Player stop working" message appears.
Note: After Click OK on the "GoPro Player stop working" window only the "GH010074.jpg" window is closed, main window titled "GH010074.MP4" still working and available.
I tested today the "File->Export" function with the default options settings and works property.
Thank you for the details, @jesúsenriq02605. May we know which version of the Player is installed on your computer? We will share this feedback with the team in charge.