We can replace the icons and remove ALL credit from this person.
The generator was not used for commercial purposes or financial gain.
No license attached to any work, so a share-alike was presumed with credit given.
As it is, the user can't claim an copy protection because he/she took the Tripewire made icons and edited them.
They are not his/her work product and since no license attached we were free to use them in a reasonable manner without financial gain and for non-commercial purposes.
Now, even if he/she sues (after learning English), it would have to be in the US, and even then there is no cause of action (nothing to sue upon) and the person has no damages and could not even make a case for damages.