If you want ScangearMP to appear in the Dash, you can create a .desktop file for it.
Copy the following into a text editor:
[Desktop Entry]
Version=1.0
Name=ScanGear MP
Comment=Cannon's scanner software
Exec=scangearmp
Icon=scanner
Terminal=false
Type=Application
Categories=Utility;Application;Graphics;Scanning;
Save the file with filename scangearmp.desktop
To use the desktop file from the Dash you will need to copy it to /usr/share/applications
for any user to be able to use it (you will need administrator permissions) or to ~/.local/share/applications
(where ~ means your user directory) if you just want it to be available for one user.
Source: adapted from Creating a .desktop file for a new application, and as I've used myself.
Notes:
Version
Refers to the .desktop file version, not to the program version.
Name
The name that should be displayed on the menu.
Exec
The path to the executable. As scangearmp installs into /usr/bin (in the default path) I've left off the full path, which works for me.
Icon
The path to the icon file that will be used in the Dash. I've used a generic icon name that's also used for Simple Scan.