Hello, Petscia,
Thank you for contacting us and for using XStore.
Could you please record a video of the problem?
Upload the video on a filesharing service, for example – https://wetransfer.com/ , and provide us with the URL.
Make sure you follow our documentation – https://www.8theme.com/documentation/xstore/theme-installation/theme-update/
Kind Regards,
8theme team