I have entered the received registration key in the registration window, but the registration key is invalid.

Please ensure following points are met while activating the application:

1. Copy and paste the registration code instead of typing it in the activation dialog box.

2. While copying the registration code, please ensure that no extra spaces or characters are copied along with the code

3. Ensure that you are pasting the registration code in the correct field.

4. Ensure that the registration code matches the application and version installed on your system.

If the application is not accepting the registration key, then you need to contact Stellar technical support for further assistance (keep your order number handy while contacting technical support). You can contact technical support at the following numbers: 

Location	Technical Support Number
USA (Support)	[phone]
Europe (Sales & Support)	[phone]
France (Support en anglais sur tous ses produits)	[phone]
Germany (Englische Unterstützung für alle seine Produkte)	[phone]
Netherlands (Sales & Support)	[phone]
Australia & Asia Pacific (Sales & Support)	[phone]
Worldwide (Sales & Support)	[phone]
Request for assistance	Click to open web-form
Skype Id (Support)	stellarsupport
Email	[e-mail]
Online Support Help	http://stellarinfo.com/support/