HALion Sonic Se 3 program does not open

Hello, I have reinstalled both Dorico 4 and HALion Sonic Se 3. Dorico opens but there is not sound. I am unable to open HALion either by itself or through Dorico. HALion shows up in Dorico under the VST Instruments button , and under Track Inspector button.
I am running Windows 10 fully updated, i5, 12GB RAM and 1Tb hard drive with plenty of space. Any suggestions why HALion is not opening?