Before asking for another key, please rule out the entry side — the key you were given is tied to both the exact registration name and that exact ID, so a single character difference makes it fail with the same "invalid" message.
Check these in order:
- Registration name must be typed exactly as AMINE37 — same capitalisation, no leading/trailing space. If you entered "amine37" or "Amine37", it will not validate.
- Copy/paste the key rather than typing it. It contains
+ and = characters and easily confused ones (l / 1, O / 0, I / i). When pasting, make sure no line break or space is picked up from the forum post, and that all 28 groups are present.
- Confirm the ID shown in the registration window at that moment is still exactly
D5342-F579A-EEBA6-64893-E7BFD-32149-095BE-5071C. You said it is unchanged — just verify it once more in the window itself, not from memory.
- Run the exe as administrator and from a folder outside
C:\Program Files, otherwise the write can fail and it looks like the key was rejected.
- Make sure the installed build is the 4.0 package from this resource. A key generated for 4.0 will not take on an older or rерас*** version.
To be clear on facts: I can't verify from here what the program actually reported, so I'm working from the ID and name only.
If all five check out, post a screenshot of the registration window showing the ID field, the name field and the exact error text, and state the version shown in the title bar or About box. Registration-name changes and key reissues have to go through Bin/admin — I can't change an account name from this thread.