After the License Server of UG is changed, how can I adjust the client?

Normally, the License Server of UG will not be adjusted easily. Unless the Machine Used as the License Server of UG fails, it must be adjusted to another machine. In this case, do the client still need to reinstall ug?

No.

You only need to modify the value of an environment variable. Method:

Select "my computer-> properties-> advanced-> environment variable", modify the variable "ugii_license_file", and change it to 27000 @ newservername. newservername is the machine name of the new ug license server.