Left click the file to be opened -- click the right button -- select "Open Mode (H)" in the pop-up menu -- click "Select Default Program" in the pop-up item on the right -- then click "OK" if there is a warning from the security software -- select the program you want to change,Click OK - success!
I just tried it out. Go to the control panel, program, set the default program, select WordPad, and a connection will come out. Check TXT, and then open a TXT file randomly to change the opening mode to Notepad.At this time, if you always use this program to open the file, it will no longer be gray, and you can choose.
