Set the loop region to the area you want to render.
Solo the track you want to render.
Go to 'File', then 'export', then 'Audio Mixdown'
In the drop down 'After Mixdown', select 'Insert into project'
Choose a name for it.
Hit 'Export Audio'.
You might need to position the audio correctly in your project after this.

Cubase Elements & Artist do not have the 'Automation Panel' so you can't 'show automation on write', but it's not a big problem. Once you have recorded in some automation, simply click the + button on the bottom left of the channel (in the project window) which shows the automation lanes. Normally the first lane shown is the volume automation but if you click the + at the bottom left of the automation lane the next lane will always show the newly recorded automation. If you record multiple automation's on one channel, keep expanding the automation lanes to view them.

We can only advise this for Windows PCs

Be aware this will remove any and all Steinberg products, not just Cubase!

In Windows, go to 'add or remove programs' in the start menu (just start typing it, it will show up). Scroll down and uninstall all 'Steinberg' entries that are there.

Next use file explorer to go to the following directories. In these directories you will find more 'Steinberg Folders'. Just delete any folder that has 'Steinberg' in the name. Do not delete anything else. Please note, some of these folders are hidden folders. To show hidden folders follow the instructions here https://support.microsoft.com/en-gb/help/4028316/windows-view-hidden-files-and-folders-in-windows-10

Potential Steinberg folder locations:

C:\Users\(your user name)\AppData\Local

C:\Users\(your user name)\AppData\Roaming

C:\ProgramData

C:\Users\(your user name)\Documents

After this is done, Cubase and any other Steinberg related products have been removed from your computer. To reinstall, download the 'Stienberg Download Assistant' from HERE. Find the version of Cubase you are using and download the 'Full Installer' (it should be over 20GB). Once downloaded, install it and you should have a fully working fresh version of Cubase installed.