I launched OR and got this:
After disabling all layers (some of the objects flashing):
It was working fine a week ago. I also tried to re-download the airport, but it doesn't help.
Dell Inspiron 3737
Intel(R) Core(TM) i3-4010U CPU @ 1.70GHz 1.70 GHz
RAM 4 GB
Intel® HD Graphics 4400
Windows 8.1 64-bit
Java Version 8 Update 31 (latest - IIRC there was an update earlier this week)