Thanks for evaluating Test Studio Visual Studio plugin. The video you referenced is a bit outdated. The new version you downloaded no longer references tests as "WebAii;" you will see "Web Test" and "Wpf Test." They are designated with check icons (see screen shot attached).
Pick the applicable test and notice the file extension is now .tstest and no longer .aii. Please contact us again if you have further questions.
the Telerik team
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