I have a new computer, and I'd like to transfer my IntelliJ Ultimate license from the old system to the new one, and also bring over my configuration.
How can I do so?
IntelliJ IDEA license is not tied to a physical machine, rather to a user / account. Therefore, there is no need to transfer your license; you just register the IDE as usual on a new system.
As for the settings, you can use the import/export or the settings sync feature.
Another way would be to just copy the configuration directory from one machine to another.