Most modern versions use online verification:
For offline machines (rare, given WindowTop’s focus on interactive desktops), some older versions support offline key files. Check the official support page for manual activation instructions. windowtop activation key install
⚠️ No offline activation – an internet connection is required when entering the key for verification. After activation, you can use it offline indefinitely unless the license is revoked. Most modern versions use online verification :
After entering your email and payment details (PayPal or Credit Card), you will receive an email with the subject line: "Your WindowTop Activation Key." For offline machines (rare, given WindowTop’s focus on
Pro Tip: Check your Spam folder. Sometimes the activation key email gets filtered out. Save this email in a "Software Licenses" folder.