I am having a similar issue regarding the Breaking Ground version.
Short version:
Two workarounds that worked.
1 - Reverting to version 1.7.2 of KSP. That version works with version 1.1.0 of Breaking Ground.
2 - Copying the expansion's folder from my other computer that had the correct 1.2.0 version.
Long version:
On my Linux computer (Ubuntu 18.04) Steam installs version 1.1.0 of the expansion. KSP gives me the following error:
Expansion Loading Failed
The following expansions failed to load:
Breaking Ground: Expansion Version [1.1.0] isn't a valid version that can be loaded! Minimum [1.2.0] Maximum [1.2.0].
On my Windows 10 computer there is no problem. Breaking Ground 1.2.0 gets installed and works.
I have tried verifying file integrity, clearing the download cache, changing the download region, and uninstalling and reinstalling. Still getting version 1.1.0 on Linux.
I looked at the files in the expansion and didn't see anything platform specific, so I copied the 1.2.0 version from my Windows computer to my Linux computer. Seems to be working.
I don't know if this issue is specific to Linux, or not.
I have filed a support ticket with Steam, but it's late and on a Friday so it might be a while before they respond.
As far as the broken sound/mods, I don't know. I haven't had that problem. Only thing I could suggest is to remove the mods and reinstall. The only mods I've been using lately are MechJeb, Editor Extensions Redux, and their dependencies.
