Hypothetically, you could make a windows 10 vm, run it with a "vmware player". And install a caldera trial.
Caldera won't let you install the trial twice, but if you performed a backup of the vm, just before installing the trial, you could delete and recreate the vm and do a second trial.
A lot of work, but it would get you through your 40 days
Be more careful, with that dongle in the future