You can try to set "Restore the interface when last closed" at startup.

as shown below, click "Cool Dog Music" in the upper left corner to open a menu, and click "Settings" in the red box.

Then click "General Settings" on the left in the window shown below, and then check the items in the red box.

Then restart Cool Dog Music to see if the problem still exists.

if the problem persists, please consult the customer service of Cool Dog Music.