Update version prior to release

auto_rx/autorx/__init__.py

@@ -12,7 +12,7 @@ from queue import Queue
 # MINOR - New sonde type support, other fairly big changes that may result in telemetry or config file incompatability issus.
 # PATCH - Small changes, or minor feature additions.
 
-__version__ = "1.7.4-beta3"
+__version__ = "1.7.4"
 
 
 # Global Variables