You are wrong again. You should read the entire court case.
Cloanto is clearly attacking Hyperion saying that Hyperion has no rights at all since the settlement agreement according to their view, is now void due to breach of contract.
And not only that, they are the ones who are complaining about AmigaOS 3.1.4 with wild claims just to muddy waters even further.
Understand that Cloanto legally needs to clearly position themselves as holders of development rights to legitimate their 3.x product line, which is one of Hyperion´s complaints.
Again: there is no angel and no devil here, in both cases it is just the search for the destruction of the other "competitor" company.
Capitalism at its best. 
No, I am not wrong. Simply, because Cloanto says the settlement agreement is now void due to breach of contract does NOT mean the breach was due to Hyperion's abuse of it's developer rights. Hyperion, has already breached it several other ways. Specifically, distribution of software they have no rights to
(e.g. Kickstart 1.3) and trademark abuse (e.g. registering Cloanto's trademark in the EU and claiming rights to Cloanto's Amiga trademark).
The above are only few examples of the numerous Hyperion breach's, but they are certainly the most blatant of them. The possibly that the settlement agreement could be voided as a whole, which may affect Hyperion's developer rights does not mean Cloanto is specifically attacking Hyperion's developer rights. It is merely incidental.
BTW, even if the settlement agreement is voided, Hyperion can still continue with development and distribution under it's previous OS 4 licensing agreement. Whether or not this restricts Hyperion in some ways is not exactly known.