license stopped working

Ok so here's my problem...the license I have been using for almost 2 yrs for my cnc has stopped working. It goes through it's 25 steps & then shuts off. It then pops up in my program telling me the license is not verified. I don't understand what happened. I changed nothing in the program. I used 1 day & then the next day it stopped. How do I fix this? I've tried uninstalling it & reinstalling it. Putting the license in there just like I did previously. Still not working!! Any help is greatly appreciated! I can't find anything regarding how to fix this or what happened. TIA

The CNC software license problem you are experiencing may be caused by reasons such as expired license, activation failure, system compatibility or software conflict. First, check whether the license has expired or needs to be reactivated, and make sure the network connection is stable or the offline activation file is correct. Secondly, contact the technical support of the software vendor and provide the error information for assistance. Also, check whether the system and software are compatible and make sure there is no firewall or anti-virus software interference. Try to reinstall the software or use a system restore point to restore to a previous state. If the problem is still not solved, check the log files or use diagnostic tools to further investigate. Finally, make sure the software is up to date and re-enter the license information. With these steps, you should be able to resolve the problem. If it still cannot be resolved, it is recommended to contact the vendor support team for further assistance.