Just to be clear, you can go directly from 1.0 to 1.4, correct?
1.40
If THIS number changes, you need to do a new full install.
1.
40
If THIS number changes, it is not compatable with your database, and you will lose your saved game(s) and such. (replaces Aurora.exe and AuroraDB.db)
1.4
0If THIS number changes, only the executable has changed, and you can continue with your existing game(s). (replaces only Aurora.exe)
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I'm not sure what's going to happen after 1.9.whatever, but probably the patch will be called 1.10.0 or maybe 1.A.0