Trying to transfer Pro 2019 license to new computer, lost my activation code

See this topic:

Short version is that you need to edit this file:

C:\Program Files\SketchUp\SketchUp 2018\Resources\en-US\i18n.dat

Look for the line that currently says ONLINE_TEST_URL=Google and change it to say this:

ONLINE_TEST_URL=https://www.bing.com/

Save that change and then reopen SketchUp.