Guys, if the game states it's version 1.4 at the bottom right of the "Main" menu page....... then it's version 1.4. If it reads version 1.3........it's version 1.3!! It doesn't matter what the readme's, download site statements, or anything else says differently........the game itself knows what version it's files are.
The fact that a couple of mods for a 1.4 version seem to run on a 1.3 version just proves there's very little difference between the two versions. It's no surprise to me the 3rd and 4th patch were similar in their files. I can tell you that's a whole other story when you compare 1.4 to 1.5!
One thing that
was fixed/changed with the 1.4 patch over the 1.3 version was the units of measurement on the Navigation Map. Below is the 1.3 version of the map showing the unit of measurement with the ruler using tenths of nautical miles. Nautical miles were used from the game's release to measure distance. Not a very "user friendly" way of measuring distance.
With the 1.4 patch, the ruler measurement was changed to either meters or yards, depending on which unit of measurement (Imperial or Metric) was chosen. The below image shows a 1.4 version of the same game map with the Imperial unit of measurement as the option, a "y" is displayed at the distance figure for yards. Using the Metric option, the unit of measurement would have an "m" at the distance figure.
If you don't believe the games version displayed on the "Main" menu page is correct, just check the Navigation Map's unit of measurement of the ruler. If it looks like the nautical miles measurement is used.......it's version 1.3 or earlier. If there's an "m" or "y" at the distance measurement.......it's version 1.4 or 1.5.