This will normally happen after you try to update from one version to another. In that case, if you do not have a current Software Support Agreement with RDI Technologies™, the software will prevent you from running the newer version. The only way to resolve this issue is by uninstalling the newer version of software and reinstalling the original version.
To prevent this, you can check the expiration date of your Software Support Agreement BEFORE you update any software.
The expiration date will be shown on the "Information" screen shown below. To open it, click the "i" inside the blue circle in the upper right-hand corner of any one of the RDI Software applications, highlighted by the green box below. The expiration date will be at the very bottom under "Manage License" as shown in the bottom green box.
Where can I find information about my software license?