.83: How can i delete all future workouts (past and present) except the oens i completed?

I wanted to make one route recurring to force me to get out there and run... however ,i find i don't need that reminder as i prefer changing routes. However, the only way i can delete the future (past and present) workouts is if i go one by one, or delete the entire workout type, including the ones i actually did completle, which i also tracked my gear on.

So, i want to know is there anyway to only delete the incomplete and future instances of a reminder?

Thanks alot

T.