How do I clear
 

How do I clear:-

/home/richard/.get_iplayer/download_history

OR

can I look what's in there ?

How do I clear Reload this Page
 

I'm not using iplayer,I tried looking for some helping answer; maybe the following link can answer your question: https://code.google.com/p/get-iplaye.../detail?id=264
just check it, nothing to lose as long as careful taking while working on deleting anything

Likely just open with an editor, delete what you don't want to keep, it's just a file.