A client acquires "additional user" software licences from a distributor under a special licence agreement that varies from the normal end-user licence agreement. This variation allows the same licence keys to be reused on multiple installations. The Distributor warrants that it is authorised to make these variations to the licence agreement. The details of the arrangement with the supplier that authorised this are not available, but when it has been discussed, "it's all confidential" is the stock answer. The client is invoiced for the additional licences, but in one case a note on the file and another verbal advice to staff by the Manager says "do not order on supplier". It is possible but unlikely that the arrangement with the supplier allows the distributor to make unlimited sales to its clients without further payment to the supplier. Subsequent to this, the supplier makes a change to introduce an "unlimited user" licence for the latest version that, if purchased, and the client were to upgrade to it, would regularise the transaction.

Question:

Would such a changed event and/or the passage of time be sufficient to regularise the transaction?