- fixed install issue (again, lol )
@oweno was able to give me some steps to reproduce the error.
the issue was caused by upgrading from 3.0 (or earlier 3.1 beta) to 3.1 by copying the zip file and using the 'Install Update…" option, rather than unzipping.
knowing this has allowed me to track down the issue, and fix it properly.
one minor issue remains, and that is that the zip file is not deleted, this is due to a bug in 3.0, which Ive fixed in 3.1… in other words, subsequent upgrades will correctly delete the zip file after the install, due to the change ive made in 3.1.
it is recommend for anyone upgrading from 3.x , to copy the zip file to the USB stick, and then use the “Install…” option (i.e. do not unzip the file on your desktop and copy across, unless your using 2.1) - using this process should prevent issues we faced in the past with ‘corruption’ caused by usb sticks.