If you open an x-terminal and type Code: /opt/usr/bin/columbus you will get output that may help decipher what's gone missing.
/opt/usr/bin/columbus
ApplicationController: Initializing configuration manager. ApplicationController: Initializing database. ApplicationController: Using database path: "/home/user/.cache/rx/columbus/waypoints.db.sqlite" ApplicationController: Opening database. ColumbusWaypointModel: Checking and updating database schema if required... ColumbusWaypointModel: done. ColumbusWaypointModel: Found 0 records ApplicationController: Creating telemetry source objects. ApplicationController: Attempting to start up location services. ApplicationController: Location services started. ApplicationController: Initializing logging manager. ApplicationController: Initializing plugin management system. PluginManager: ctor() PluginManager: Loading plugins from: "/opt/usr/lib/columbus/plugins" PluginManager: Found plugin candidate: "libbluetooth-plugin.so" PluginManager: Loading plugin candidate: "libbluetooth-plugin.so" BluetoothServerPlugin: ctor() BluetoothServerPlugin: Initializing plugin. BluetoothOptionsDialog: Restoring configuration. BluetoothOptionsDialog: Performing UI update. BluetoothOptionsDialog: Performing UI update. PluginManager: Registered plugin: "bluetooth-server" PluginManager: Found plugin candidate: "libnetwork-plugin.so" PluginManager: Loading plugin candidate: "libnetwork-plugin.so" NetworkServerPlugin: ctor() NetworkServerPlugin: Initializing plugin. NetworkServerPlugin: Loading configuration settings. NetworkOptionsDialog: Restoring configuration. NetworkOptionsDialog: Performing UI update. NetworkOptionsDialog: Performing UI update. NetworkOptionsDialog: Performing UI update. NetworkOptionsDialog: Performing UI update. PluginManager: Registered plugin: "network-server-plugin" PluginManager: Found plugin candidate: "libusb-serial-plugin.so" PluginManager: Loading plugin candidate: "libusb-serial-plugin.so" USBSerialPlugin: ctor() USBSerialPlugin: Initializing plugin. USBSerialOptionsDialog: Loading settings. USBSerialOptionsDialog: Performing UI update. PluginManager: Registered plugin: "usb-serial" ApplicationController: Loading application configuration. ApplicationController: Connecting telemetry source signals. ApplicationController: Initializing UI configuration structure. /opt/usr/bin/columbus: symbol lookup error: /opt/usr/bin/columbus: undefined symbol: _ZN13ConfigManager13prependOptionERK7QStringS2_RK11QStringListi