Updates?

Those cost money to develop and deploy.
My advice would be skip SH V and get a hard copy of SH IV Gold.
That way you can get your UBoote fix and play some decent American Subs. Plus it includes the last patch work from Ubi and will set you up nicely for the super mods. Those mods "finish" fixing the sim.
I'm still puzzled about your blue night sky. Maybe it's Windows 8 not playing nice with your hardware and/or the graphics drivers.
Rumor has it that the next entry in the SH series will be a browser title.
Zynga Zynga!
Subville anyone?