There are two ways to do this: either copy and paste the files to a new folder or by using Extension Migrator which was recently released with SketchUp 2025.
For step-by-step instructions, please refer to this article : Migrating after Updating
Note: this is a link to the Trimble SketchUp Help Center hosted by our US SketchUp partner as additional references. However, please note that any questions relating to your account and billings, you should always refer to our SketchUp Australia website and contact our team.