I'm not sure that the trial version will load automatically at startup (though I believe it should). One potential cause for this not loading at startup is a security app preventing certain settings from being applied to your system.
A workaround for this is to put a shortcut to wbload.exe (located in the WindowBlinds folder) in your startup directory. Running this file at startup will have WindowBlinds loaded at each start for 30 days.
-Mike[Stardock Support]
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