[libreoffice-users] Can't start up LO5 any more

Hi,
I'm experiencing some problems; installed LO5 yesterday (windows) and it was working fine; earlier 
this morning I had some docs open and it still seemed fine. All documents have now been closed, but 
I can't seem to start up LO5 any more.I've tried: double clicking a file in windows explorer
double-clicking a file saved to desktop (I suspect thi is exactly the same thing)
double-clicking LO5 startup icon on desktop
selecting LO5 from start menu

- all to no avail. I checked the task manager in case it was somehow running in an "invisible" mode 
(such things do happen - but no, it's not running at all and I can't get it to run.
I will try a reboot at some stage - can't do that just yet - but does anyone have any idea what 
might be preventing LO from running? Anyone else experienced anything similar?
thanks,/Gary
   
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