Is NetShade not accepting your registration code?
Make sure your code is for the version of NetShade you’re trying to run. Codes beginning with NS4 are for NetShade 4.x for Mac or NetShade 1.x for iOS. Codes beginning with NS5 are for NetShade 5.x for Mac or NetShade 2.x for iOS. NetShade 4 codes can be upgraded at the Account Info page.
A different issue?
It may be covered in the FAQ.

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