NVDA 2016.2.1 does not install some addons from official addons website completely



here is description of problem:

when i downloaded addons from addons.nvda-project.org to my computer and opened chosen addons, nvda made as usual. Then I restart nvda, but in Addon manager addon status was "install" and now I cannot use some of addons. These are: ControlUsageAssistant, FocusHighlight, Ocr, PlaceMarkers SystrayList and Wirtual revision.

What could be wrong?

Thanks, Jo┼żef

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