Installing 4.001 can remove other programmes - When 2.6xx is prior installed version

[Garry A. Leslie]

Hey All,
Have had a frustrating weekend.
After losing all my programmes when installing Microstudio 2.613, which I used to swear by.
I put them all back on and then downloaded 4.001 which is not supposed to cancel all the other programmes. IT DOES.
I loaded it and every other programme gave me the "serial number does not match".
Can get them all back except the most important, Hoster, which requires a special code.
I have Hoster 3.313 but not what I had before 3.316, this I did the update and never put it on a CD, did it without thinking just goes to show however long or however much you think you know you can guarantee you will goof sometime
Regards from across the pond
Garry