Enable hidden options in Ableton Live 9
First you have to create a text file called "Options.txt" in the same folder where Live's Preferences.cfg file is located. Here's where to find the preferences folder (Live 6.0.9 or higher): Download Option.txt here
Windows XP 
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\Documents and Settings\[username]\Application   Data\Ableton\Live x.x.x\Preferences\ 
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Windows Vista, Windows 7, Windows 8 
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\Users\[username]\AppData\Roaming\Ableton\Live   x.x.x\Preferences\ 
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Mac OS X 
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 -ShowDevicesSlots- 
-NoVstStartupScan 
Faster Ableton startup, if you add new VST you must scan vst folder manually in Preferences.  |   

