i got serial no. for upgrade i bought my version from ashampoo but i bought the upgrade direct from magix
That is pertinent information that you should have included, given your other post.
Here is what I wrote:
Did you receive an email with the serial number for Premium (I presume 2022 since you didn't say)? If not, check your spam.
There is no "download" for Premium. It is not a program; it unlocks features and presets in the program Music Maker 2022 and gives you credits for some instruments and Soundpools. The program is Music Maker 2022 and it's free. You need to install it first, either by getting the free version or by using the link to the installer in the email (it installs Music Maker - the free version). Once you have MM2022 installed, then you activate Premium by logging in (Join) on the start up screen, then by putting your serial number in the appropriate box. Then, some stuff will automatically download and install, the rest is under Downloads tab where you will have to download and install everything.
Edit: If you have already installed Music Maker 2022, you don't need to install it again. The version number that you see in the startup screen should be 30.0.3.39.
Ashampoo should have provided some instructions what to do once you purchased a program. I assume they would send some sort of order confirmation where I would expect to find instructions and perhaps a redeem code. This is what has happened when I've bought Magix stuff from other suppliers. If not I think you need to ask Ashampoo and of course check your spam folder.