Hello,
As of today (but not true yesterday), Sibelius 7.5.1 stalls/freezes on playback initializtion when loading the VSL Instruments DLL and VSL Instruments PRO DLL. I have tried redownloading the DLLs and rescanning them with Sibelius, but this has failed. If I load Sibelius without the VSTs and add after, they no longer appear in the Playback Devices, nor can I switch to a VSL instrument configuration.
Windows 7, 64 bit.,