Few general notes about generating themes:

• The themes are generated on a remote server. Timings may vary but it might take between 20–40s for a run.
• Regular license holders can generate 5 themes per day.
• If zip extension is available on the server, the theme will be updated automatically.
• If the extension is not available, you will need to upload the archive you'll be getting into: public/css/theme.
• When updating your site, remember to back up your public/css/theme folder and restore it after the update.