If you have not updated to Design 3D CX 8.1.2, then you need to do so.
We switched web hosting services about 2 weeks ago and the new server system has a newer internet connection protocol. This required a change to the Manage License functionality and that was added in the CX 8.1.1 update a few months ago. The current release is CX 8.1.2.
You can update to version 8.1.2 by using the “Check for Update” command in the Help menu to download the StrataUpdate tool. This is the recommended method, unless you are behind a company firewall that might not allow this method to work for you.
If you encounter an issue updating using the StrataUpdate tool or you have a multi-user license and need to update several computers, then you may need to download the full installer disk image. The link to the full installer disk image is below. It contains Strata Design 3D CX 8.1.2. If you use the disk image method, be sure to do both... step 1 (let the copy process finish), and then step 2 to complete the installation process.
If, after updating to CX 8.1.2, you continue to have trouble connecting to the license server, please contact technical support at firstname.lastname@example.org.
We apologies for the inconvenience and thank you for using Strata Design 3D CX.