FSX or FSX-SE Product compatibility

[abh_jc_03 0]

I just installed windows 10 and I’m trying to decide if I should reinstall FSX or FSX Steam. My main question is that, will my current FSX products that I have bought be compatible with Steam?  I have bought a lot of products like PMDG, REX etc. I don’t want to install Steam if they won’t work. 

[Bob Scott 7,712]

It's a mixed bag...some addons work fine, others not.  Generally, if you install ONLY the Steam version without trying to run both versions, a lot more addons seem to be able to work OK.  There is also a fair bit of ambiguity when installing to a Steam-only config, as many addons recognize that the same as the boxed version.

I reincarnated FSX on my portable machine and ended up using Steam, mostly because of the ease of installation using the online Steam installer.  There weren't a lot of addons that couldn't be coaxed to work with it, but there are a few.