Started out with purchasing MC25 upgrade, going from MC21Windows 32bit Vista. Downloaded MC24 and used upgraded Key and would never install, kept getting JR tools not loaded error etc.
Got frustrated and put it aside. Now I have new computer, Win10/64bit, downloaded MC24 and restored my key, and says not valid for this product? had key emailed to me and noticed it had MC22 Listed with it?,so now really confused, do I need to download MC22 ? will it work on 64bit? key is supposed top be for latest 25??