Thank you for the information you have provided. Can you confirm the error messages that you are receiving? This will help to understand what is causing the issue.
a few minutes ago i tried to upgrade from 1.8.2.to 1.8.9 hoping that after this my upgrade from 1.8.9. to 1.8.11 will work.
ERROR
at point 13 …1050 Table “lktagdisplaygroup” already exists
this error is similar to the errors i got in 1.8.2.to 1.8.11. Seems the upgrade procedute tries to do some things that are already one earlier.
Restoring my xampp with 1.8.2. works again, but I would like tu be always in the newest version.
Greetings from Austria