--- January 27, 2022 ---
The problem that the screen freezes when the download panel is displayed is occurring again.
At this time, the only solution to this problem is to revert to version 1.6 or earlier.
The download speed will be greatly reduced, but let's accept it as it can't be helped now.

--- January 21, 2022 ---
The button under the player is hidden again, but it is possible to call the download panel from the button in the toolbar of the browser.
If the download panel doesn't finish loading, lowering the version to 1.1.7.2 may help.
By the way, the download speed issue has also been resolved since 1.1.7.2.

(The above is a translation of Japanese into English using Google Translate.)