When activating SquaredUp you see the following message:
"An error occurred: The key provided is invalid. Activation keys must consist of at least 5 groups of letters and digits"
On SquaredUp v4.0 and below you should use the old style licence key, consisting of 5 groups of 5 letters/numbers. Remove the prefix from the licence key to leave just 5 groups.
For example, remove
SQUP-PRIMARY- to leave just
SquaredUp v4.1 and above accepts either the old style or the new prefixed licence key
For more information see How to activate your licence