A little followup to my previous post.
I have managed to get things more or less working by not using any of the SweetFX profiles I could find anywhere, none of them give decent graphics (and I've tried about a dozen of them). Instead I used the SweetFX configurator program and made changes myself.
Using this I came to realize though that SweetFX is not for me. The margins to get things looking right are tiny. Differences between 0.85 and 0.87 on a scale of 0 to 8 for example make a huge difference. The main culprit for messing things up for me at first were mainly the bloom and hdr settings. I fiddled with these settings and can make the image either too dark, too light or just right but with 'candy' colors. I'm not a fan of the look at all. It's not a natural look. The ground looks alright, but the sky has clouds with blue in them or even cyan.
When I finally had a preset that sortof looked alright, I went to a different time of day and things were messed up again. Not even starting to talk about nights where everything's pitch black.
I then wanted to make a screenshot and started Fraps (a screen capture program), which promptly removed all the effects from the screen.
I think I'm going to leave it at that and just enjoy flying. Spent 4 days off trying to get things working. First dx9 and enb, now dx10 and sweetfx. I'm done with it. The dx10 default look is fine and decent scenery makes a huge difference.
Shade doesn't seem to do anything either in dx10 mode for me. I guess I'll just have to wait for a proper dx11 flightsim, if that ever gets made.