It is at C:\user\<yourusername>\AppData\Roaming\reolink and it is called userSettings which you can edit with Notepad,Scroll down to find this key:{"key":"hardware-acceleration","type":"boolean","value":true,"_id":"SC7vYAO3Jz5CRFqs"}(Note: I'm not sure if the id at the end might be different for you, but don't change it)Just change the word true to false, save the file, and that then works next time you go in. I hope that helps. It's been a frustrating bug.

Running version V7.2.2.33 64 bit. Do Not have "C:\user\<yourusername>\AppData\Roaming\reolink" and yes I did change the Username. What I do have is "C:\user\<yourusername>\AppData\Roaming\" but no subfolders with Reolink. and yes I did select show hidden files. Also searched for {"key":"hardware-acceleration","type":boolean","value:true,"_id":"SC7vYAO3Jz5CRFqs"} which does not exist.

Any other suggestions.