CU's license for JMP runs only one year at a time. So every license expires in late summer, and then a new SID file must be downloaded and used to license JMP for another year.
An SID file downloaded today can be used to install/license JMP any time through August. In late August we post a new SID file so that you can re-license JMP for another year.
Be sure you have downloded the current SID file to a place you can easily browse to. Then: