Hi, thank you both for your replies - I really appreciate it.
Yes, I checked both those bitcoin explorers and there is a confirmed balance on the address. This exactly matches the balance shown on blockchain.com under my 'imported Bitcoin addresses', which is the same address shown in my private key window.
I will let you know how I go.
I'm guessing you're referring to Loyce's suggestion? If so, then he never mentioned Exodus desktop. He was suggesting you use Electrum desktop and so does the guide I sent above.