Ensure that hidden files and folders are visible in your system. To do this:
Go to the C: drive where Windows is installed. In File Explorer, click on the C: drive.
Inside the C: drive, find and open the ProgramData folder. This folder is usually hidden, so make sure you have enabled the visibility of hidden files and folders as described earlier.
Inside the ProgramData folder, find and open the AnyDesk folder.
Inside the AnyDesk folder, find the service.conf file and rename it to service1.config.
service.conf → service1.config
After renaming the file, restart AnyDesk, and this should reset the trial version and change the address.