There is no official Windows version, nor is there a "license key" or "extra quality" paid version of the software.
Many "key generators" or "cracks" are actually Trojans designed to steal personal information or lock your files for ransom.
While many websites claim to offer "extra quality" or free license keys for TubeMate on Windows, using these is highly risky and often unnecessary. The Truth About TubeMate License Keys
Your PC’s security and your legal peace of mind are worth far more than a $15 software license.
Any site offering a "windows tubemate license key extra quality" generator is almost certainly trying to trick you into downloading malware, ransomware, or adware.