I wanted to know if anyone has an answer for me. If i still have my public/private key, can i withdraw the BTC that i previously put into PlusToken using those methods since Plustoken has shut down?
First you need to find out what happened to the plus token and also; did you invest your bitcoin into the project? If you sent btc in the hope of receiving plus token back then; then you do not have bitcoin again; but plus token. Well knowing full that plus token is closed; its a 50?50 scenario for you
It is not even 50:50 , it is completely 100% on the scammers part. I am sorry to say but OP's greed to earn more has today let him to a state where not only he has lost his Bitcoin but also recieved tokens that have zero value. This situation should set an example for all newbies that there is no shortcut to earn money.