I was mining ETC to Jaxx not knowing it's not a good idea.
How do I upload private keys to a different wallet and what wallet is the best one to do that?
What problems are you facing?
I've been using Jaxx for ETC for months and never faced any issue.
Anyway, you can see private keys through this procedure :
https://decentral.zendesk.com/hc/en-us/articles/218375657-How-can-I-view-my-private-keys-