Thanks for replying.I downloaded v1.9st unpacked it and uploaded all the files under the upload folder to my support folder overwriting all the files there. I did not delete ost-config.php at this stage.Then I opened our support/ url and the full installer window came up - not the upgrade window.Not wanting to loose existing data I didnt go any further.After my forum post, I noticed the site had stopped all mysql connections which turned out to be due to CageFS had mysteriously stopped working for the cPanel it was fixed by re initiating.Now the support/ url is opening the backend login and I receive emails announcing the following sql table not found errors:
Table 'mysite_ost.ost_content' doesn't exist
Table 'mysite_ost.ost_content' doesn't existI'm wondering if there is a simple way to upgrade the mysql database to 1.9 structure manually which may get it up and running.Alternatively should I restore my backup of v1.8.2 and start over?