Hi,
That won't work. Just changing the first 4 characters creates an invalid activation code. You need to use the full activation code associated with FE8C. I left the rest off since this is a public forum.
Our licensing implementation is a bit confusing, so allow me to explain. There are two ways to get licenses:
1) You click on the download link from the S32 Design Studio Product Page. This triggers the Flexera system to generate an activation code for the specific version of S32 Design Studio you selected.
S32 Design Studio for S32 Platform v3.4
S32 Design Studio for S32 Platform v3.5
The first time you do this, an email is sent to the address on the account containing the activation code. But you can always find it by navigating to the page where the link to download the install file is located and selecting the 'License Keys' tab.
2) Someone sends you an entitlement for a particular device. In your case, S32K3 Standard Software. This gives you entitlement for any version of S32 Design Studio. This license can move between versions, but only forward. So once it is used for v3.5, it no longer works for v3.4 and so on. This is the activation code you are currently trying to use for both v3.4 and v3.5.
You already have a license for v3.4 by method 1 above, but it seems you aren't aware of it. To help with this, I suggest you use the link I provided above for the v3.4 download and look for the 'License Keys' tab and find your v3.4-specific activation code. It should match the first 4 characters with 'FE8C'.
Best Regards,
Mike