Hello Mr. Hoeckelmann,
Thank you for reaching out to us.
As long as you have an active JoomShaper license, there will be no issue using the same license key again after reinstalling Joomla. You can reinstall Joomla 6.0.1 and then activate your license for SP Page Builder and EasyStore on the same website without any problem.
No special steps are required beyond installing the extensions and entering your license key again.
If you face any difficulties during the reinstallation process or need further assistance, feel free to contact us. We will be happy to help.
Kind regards