get_iplayer 3.35.0-MSWin32-x64 Web PVR not refreshing cache automatically

[jon928se at gmail.com]

I think this started in version 3.34.0. It seems the web PVR is not
automatically refreshing the cache as it is supposed to, by default every 4
hours.

I have Auto-Refresh Cache Interval and Auto-Run PVR Interval both set to 4
hours. My installation is essentially exactly as the default install apart
from specifying different download folders for radio and tv. 

Jon - puzzled.