I didn't receive any key

You should be able to log into your My Products page here:

https://store.stardock.com/login.aspx?ReturnUrl=/myaccount/products

Underneath the list of Object Desktop programs to download is "Object Desktop...", and right beneath that is "Product key:"

The Product key is the activation code you use for each of the Object Desktop programs you install.

I tried but I didn't see any key.

You just purchased last night. Could be depending on what you used for payment it may take a day or so to go through. Once it does do as DaveRI said and all will be well.

If you don't see something  soon you can always send in a Support ticket. But do only send in one because if you send in another you will go back to the bottom of the list.

Please check again. You should be all set.

Thank you very much, i've already received my key product.

Glad you got it resolved. If you would care to update your post on Facebook about it, I would appreciate it.