GameEx 18.50

The .net 6 and .net 4 (XP and 32 bit) installers have been combined into a single installer. There is now just one download. This makes it easier and quicker for me to do releases and avoids confusion. To force the .net 4 install on 64 bit Windows 7 or newer set the compatibility to Windows XP or Vista.

Updated all VC runtimes to latest versions so they don't require windows updates or create surplus temporary files.

Updated .net 6 runtime to latest.