Massive download problems..

[Nic Siddle]

I have been using get-iplayer on my 32 bit Windows 7 set up for some 
months without issue. Today I set the PVR to run from the list 
previously used, but came back to find that it had already downloaded 22 
gb of programmes and appeared to be working its way through the compete 
A-Z list of available programmes.
Have the BBC changed something?
Do I need to delete and re-create my PVR list or refresh the cache? - or 
what?
Any advice would be welcome
Regards
Nic Siddle