You for go to follow the step 2
Step 2: Remove the upgrade/.htaccess file via FTP or SSH. Note that you may need to change your FTP client settings to show hidden files to see the .htaccess file in your FTP manager. Make sure that you removed .htaccess file from "upgrade" directory! Do not remove .htaccess file from Dolphin root folder, it will make almost all links on the site not working'''
When you get this fix you will see the upgrade page
