In some contexts, the number "15" in your search may refer to a specific build version or a COM port assignment. In many repair scenarios, software like JAF functions best when the box is assigned to lower COM ports (COM1 through COM15). If your system assigns it to COM5 or COM8 automatically, you generally do not need to change it, but legacy software sometimes struggles with ports numbered higher than 10. You can manually change this in Device Manager > Port Settings > Advanced.
: This often occurs when launching the JAF software even if the driver is active; clicking "OK" usually allows the software to launch the main interface.