I did a ramp test this morning and in my fatigued stupor accidentally discarded it. Is there any way to recovery it?
Get in touch with support@trainerroad.com. Assuming you were connected to the internet during the workout, they may be able to pull it off their system.
I did the same thing this morning. 
They said nope when I asked. Privacy issues keep them from saving anything you disguard.
I’d synced to Strava and deleted it on TR, could download the tcx from strava but had to edit the XML as I think TR ignores things it created. (TTH here was TrainerRoad)
<Creator xsi:type="Application_t">
<Name>TTH</Name>
</Creator>