Notes about the BT3 file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The BT3 file type is primarily associated with 'Control Runner' by MomSoft. Control Runner is a program launcher for all windows platforms. The .BT3 file Holds the configuration information of program buttons.