Can I apply Travel Funds towards a flight I have already purchased?

[TxTraveller]

Last week, I purchased a flight occuring in July 2017. 

I just realized that I have unused Travel Funds. 

Is it possible for me to apply these funds for this flight in July considering that I have already purchased this flight?

I appreciate any guidance here. 

[franktravel]

The answer would be no if you purchased a non refundable ticket.  

[TxTraveller]

Thanks.