Activation screwed up

Before discovering the export/import pages we tried to copy over the settings to the next version of our homepage by comparing the settings and copy over the carefully set and translated content. Did not work.
I get warnings now “license exceeded” and nothing works any more.
No support email address. No idea how to reset the license number to start over.
Did the license tester not check that the requests came all from the same site?
What now?