Hello Peter,
We provide each registered student with the needed software installs, licenses and credits for the duration of the course.
If your organization has the software and licenses, and the needed extensions, you will not need to re-install ArcGIS Pro software. We encourage you to run the same version of the software we use in the course, if possible.
Do note that if you choose to use your own license (associated with your organization's ArcGIS Online account) you will need to rely on your own organization for account support (we won’t be able to reset your password, etc.) and you will be consuming your organization’s credits.
Adena