Alright, I quickly reviewed your main_settings.cfg file, and you are missing quite a fair bit of stuff. I think you may have deleted a line of stuff on accident. Therefore, I think that is your problem.
Comparing your 1st line to mine:
Yours:
<Main ShowMenu="false" ExitMenuDirectly="true" SaveConfig="false"1.000000" Gamma="1.200000" Shadows="1" SSAOActive="true" SSAOSamples="8" ShadowQuality="1"
Mine:
<Main ShowMenu="true" ExitMenuDirectly="false" SaveConfig="true" DefaultProfileName="dev_user" StartLanguage="english.lang" UpdateLogActive="false"
In yours, after the SaveConfig parameter, yours goes pretty haywire.
Here's an unedited one from one of my accounts, renamed to dev_user. You will have to redo again in fixing up for the dev environment, but should help you get back on track. If it doesn't work, then there is something else bugging you as well.
This should help with setting up, just in case you lost the link
<Main ShowMenu="true" ExitMenuDirectly="false" SaveConfig="true" DefaultProfileName="dev_user" StartLanguage="english.lang" UpdateLogActive="false" LoadDebugMenu="false" ScreenShotExt="jpg" ForceCacheLoadingAndSkipSaving="true" ShowPreMenu="true" />
<Graphics TextureQuality="0" TextureFilter="2" TextureAnisotropy="1.000000" Gamma="1.000000" Shadows="1" SSAOActive="true" SSAOSamples="8" ShadowQuality="1" ShadowResolution="2" WorldReflection="true" SSAOResolution="0" EdgeSmooth="false" ParallaxEnabled="true" ParallaxQuality="0" GBufferType="0" NumOfGBufferTextures="3" OcclusionTestLights="true" Refraction="true" ShadowsActive="true" ForceShaderModel3And4Off="false" PostEffectBloom="true" PostEffectImageTrail="true" PostEffectSepia="true" PostEffectRadialBlur="true" PostEffectInsanity="true" />
<Engine LimitFPS="true" SleepWhenOutOfFocus="true" />
<Screen Width="1024" Height="768" FullScreen="true" Vsync="false" />
<Physics PhysicsAccuracy="2" UpdatesPerSec="60.000000" />
<Sound Device="0" Volume="1.000000" MaxChannels="32" StreamBuffers="4" StreamBufferSize="262144" />
<MapLoad FastPhysicsLoad="false" FastStaticLoad="false" FastEntityLoad="false" />