How long will my license last for? Do I need to purchase again after 1 year?

A VueScan license is for life, but free updates will last for one year. So even after your one year of free updates is over, you can continue to use a version that you have previously downloaded, you just won’t be able to download new versions without purchasing again. This supports development of VueScan and the work that is required to keep it up to date for new operating systems.

If you have a legacy Professional Edition License issued prior to Jan 1, 2021, then you have access to free updates indefintely.