No, as of now we don't have a trial version. May be in future. We’ll refund your order.
Hoverify only support chrome and brave right now. Give us shout, if you want support for other browsers.
Computed mode shows final styles computed by the browser. This may not match exactly with what developer provided in there stylesheets. On the other hand Selector mode shows you styles same as what inspect element would show you. Styles shown by selector mode are arranged properly according to there select.
Goto chrome://extensions -> find Hoverify and open details -> Switch on "Allow access to file URLs" -> Done
Sorry for hear that. Send us an email, we’ll be happy to help!
The extension needs the internet connection to check your license once, everything else is working offline. We use google analytics for tracking pageviews and paddle to process transactions.