I’m running HTB 10 on Win7. When I dbl click a prg file, it open HTbasic, but doesn’t load the file. I then have use Open to load the file. PRG file assoc is correct. One suggestion was to add -alt %1 to the htbwin.exe properties. I did this but it simply errors. The only thing that has worked so far it to create a bat file:
c:\Program File (x86)\HTBwin10\HTBwin.exe -alt %1
then assoc prg with the batch file instead of HTBwin.exe
This is rather clunky, and there should be a better way.