Yes, the only two files that matter are Aurora.exe and AuroraDB.db. Each “patch” download just replaces one or both of those two files. Most of the rest of the files are either ancillary, like the race, flag, ship, station, and medal images or they are important but basically never change from one version to the next such as the sqlite dlls.
You can add and remove images any time you like, fwiw.