Thank you for choosing Telerik Test Studio.
Since you do not have Internet connection try to disable the option for update check on startup. It could be accessed from the welcome screen in the "Software Update" tab (please refer to the attached screenshot). This should allow you start a project successfully.
Please elaborate more on what you mean by "tests which will affect the results"? Which results do you mean?
Thank you in advance for the cooperation and I will be looking forward to hearing from you.