What is the "DO NOT CHANGE" section?
I've tried adding check.if.already.open=0 at the end but it didn't work. Here is mi SciTEUser.properties:
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font.monospace=font:Courier New,size:10
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caret.fore=#FFFFFF
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selection.alpha=50
selection.back=#f9f9f9
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style.errorlist.32=$(font.base),back:#333333
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command.19.beta=
command.name.33.*=
command.33.beta=
openpath.$(au3)=$(SciteDefaultHome)\..\include;C:\Program Files\AutoIt3
check.if.alredy.open=0