Please turn off the Tweaks for the moment until zekew brings out a patch. If you load now a savegame with tweaked planes, errors like this can happen as some features are broken. 
How do you disable a mod?
UMF Mod? Press Shift+CTRL+F10 and you can disable it in that menu
2.3.5.320 Beta
- Works with ACEO 1.1 and helicopters DLC?
Okay, maybe it works? I’m not sure how to know that the module is running.
But I noticed that when I opened a new archive, it appeared on the unlocked map, a medium-sized parking apron.
I can now enter the game, but why is there a medium-sized parking apron on the map?
I tried two times, and both new archives will appear 
Thanks for your great work. I’m currently testing your latest beta-release with the helicopters DLC but so far i’m only getting offered flights with the Bell 206. Haven’t seen another type yet. Could this come from your overhauled flight offering in relation to the two new heli-airlines?
I can neither confirm nor deny that that is a leak of tweaks features to come, nor can I elaborate upon what any hypothetical leak means. 
Anything in the logs? I do anticipate my flight logic struggling a bit with the helicopters, but you should still get some of each.
Hey Guys,
with this mod installed I get a error message everytime the game tries to save the game.
This only happen after a few minutes of play (not when i try to save right after I started a new game). The game log shows the error message “[Saving] ERROR: Couldn’t serialize airport logotype!”
This happend even with Airport CEO Tweaks as the only installed mod.
I am a bit at a loss.
The current version is broken with the 1.1 version of ACEO.
Please try the newest Beta version
Be aware, there is a medium stand appearing in that beta without any impact and hopefully solved soon…
2.3.5.322
- Helicopters compatibility
I love this mod.
But my game crashes some time, when I’m using the “F” key to get into the flights. Not everytime but it keeps coming…
Could it relate to this mod? Just have airline Mods and the “More Planes Mod” from the Steam workshop active.
Allready updated it with the beta version one above your thread?
The flight planner crash still exist in the newest beta. I still think it’s caused by the automated flight renewal. Currently I have to save every time before I open the scheduler on my active map.
yeah, I did install the latest version.
Do I only need this file to use ACEOTweaks? (don’t quite remember) What directory do I put them in?