StruCalc 7.0 for Windows can be downloaded and unlocked at your discretion by phone, fax, or email. With the demo download you can use the free demo prior to buying and then simply contact us for your unlock code and be using the full program in just minutes!When you run the demo one input in each module is locked, except for the uniformly loaded beam module, which is fully functional. We also recommend that you download the tutorial or manual which will walk you through a sample design. If you have any questions or comments please give us a call.