Yes, but with a caveat. "Lifetime" refers to the lifespan of the current major version (e.g., Itubego 8.x). If the company releases Itubego 9.0 (a completely new product), you may need to pay an upgrade discount (usually 30-50% off). However, your 8.x license will work forever on that version.
The is a paid registration code that unlocks the full capabilities of the iTubeGo YouTube Downloader, removing the strict limitations of the trial version. Most users consider the license a worthwhile investment for high-speed, batch downloading from over 10,000 sites, though the free version is noted to be extremely limited. Licensing Options & Pricing Itubego License Key