Upgrading from Cubase LE4

Hello,
I have two questions.
First one : I have Cubase LE4 and I wanted to know if I can upgrade it to Cubase LE9 easily with the update sold by the Steinberg store?

Second one : Can I use a second hand Cubase software provided with the USB-eLicenser without any trouble? Which conditions must be fulfilled before I can use it? Does the seller has to delete his registration first before I can use it?

Thanks for your help.

William

The steinberg store does not sell Cubase LE 9.

If there is a valid license on the USB eLicenser -yes

To use it, the seller does not have to delete his registration, for you to be able to register the USB eLicenser to your account, he does have to.

The steinberg store does not sell Cubase LE 9.

Sorry, my mistake. Update to Cubase 9 Elements from Cubase LE4 is ok or not?

Should be ok