If StickyBrain 4 is already licensed on your computer when you install SOHO Notes 5.5.1 or higher, SOHO Notes will automatically recognize the StickyBrain 4 license key and you will not have to do anything else. However, if StickyBrain 4.x is not licensed on your computer then you will need to license SOHO Notes using your StickyBrain 4 license key information. Launch SOHO Notes and choose SOHO Notes > Licensing, click the Enter License button, and then choose StickyBrain 4 from the Product pop-up menu. Then enter in your StickyBrain 4 license key information and click OK. SOHO Notes will then recognize your StickyBrain 4.x license key number.