Instead of Lens you have the UMHlens you can download where you don't need a license.. for the static IP follow this guide https://learn.umh.app/course/how-to-change-networking-in-flarcar/ and there is a also a guide in the docu for flatcar and to get the cluster working again after setting static IP you can you this guide https://learn.umh.app/course/how-to-fix-error-while-proxying-request-x509-certificate-is-valid-for-error/