Blisk offers web installer for Windows which can be downloaded here.
Issues with web installer on Windows: there are known cases (e.g. using a proxy) when web installer cannot upload source files, and installation fails. In this case, we recommend using Blisk offline installer.
Once Blisk is installed, Blisk will offer to create the new account or log into existing Blisk account. Blisk account unlocks additional features (e.g. screenshots and screen recorder).
If you are offline, Blisk can work offline until you exceed the allowed time limit for the trial version.