FSUIPC has been updated for FSX-SE: FSUIPC 4.938 available now for FSX Steam Edition!.

The link is to download it is here: Updated modules

And I repeat that I have not encountered any bugs yet! Unless you call the missing engine smoke, nav and strobe lights from Captain Sim products.

Once I start flying in FSX-SE, It looks and feels exactly like the default FSX, but I do seem to get better frame rates.

We are working on our products compatibility with FSX Steam Version, no ETA for present moment.

Flight Simulator X - Steam Edition is back on sale for $US4.99!!!
The Steam Holiday Sale ends in about 39 hours (at the time of my writing this).

Hmm, I've been thinking about this a little more...

When I first heard of Dovetail Games I thought they were making a new simulator. Turns out it was FSX.
I was told they had another game called Railworks which I happened to go and check out. After reading their forums most were leaving the game due to heavily overpriced DLC, think $20 USD for a reskin! 

I think what might be going on here is they are trying to capture existing users by charging a pittance for the base game. Then let the DLC roll in. My fear is that they will tie-up with certain developers and that will be it, then they can charge what they like whilst screwing the developers. They have the form and it's all in the railworks forum if you care to read.

I'm not saying don't get it, just be aware of what might happen down the track.

You want to change your livery from Delta to United...That'll be 20 buckaroos thanks.... 

I just downloaded the latest FSDT GSX installer (1.9.0.6) and got a pleasant surprise. First it detected P3Dv2 (nothing new there), and asked me if I wated to install it there, I had not done so yet, so I installed it there.
Then it detected FSX-SE, and asked if I wanted installed there, so I said yes.
On the third run of the installer, it installed into FSX.

Seing as it found all three installations and ask if I wanted it installed in them all, it must be compatible with FSX-SE already.

If on captain sim 757 you encounter a blank grey box where the FMC, etc should be try this;

The Steam Edition of FSX uses a custom version of simconnect.

Many addons use simconnect for displaying objects and if you are having problems with aircraft display in the Steam Edition you may be able to fix them by installing the original FSX simconnect

In your Steam FSX folder (usually in Program Files (x86)\Steam\steamapps\common\FSX\ ) look in SDK\Core Utilities Kit\SimConnect SDK\LegacyInterfaces\FSX-XPACK\

You should see SimConnect.msi in that folder. Run this to install the original (legacy) version of simconnect

Happy flying