Suggest that you use our cloud eTools. Firstly, access the website, www.refriglab.com, do the "Registration" using your email, then choose the eTool, [EvapS], to start your design. If some of the parameters are not known to you, you may use [UnitqS] to get them and then get back to use [EvapS] to continue your calculations.
You can use your smartphone as well to run the eTool. Don't worry about your mobile data as it doesn't use your data and the running is on the cloud server computer.