[judeandrob]

Hi
We hope this is in the correct area...
We are new to these forums, but have happily been using Calibre on a desktop pc for ages feeding a pair of Kindles.
Our library is quite big (>30,000 books) and it was a pest to transfer to and synchronise with our slow laptop when we holidayed, so we opted to use the portable version on a big (64GB) flash drive instead.
It worked fine until update time. We tried the instructions on the 'portable' update website but met with problems about the local path being too long (>59 chars), so we tried the following method which worked better.
Download the new portable update zipfile, extract and copy across to your flash drive only the Calibre folder and the calibre-portable.exe file, overwriting existing flash drive files as necessary. No need for the Calibre Library and Calibre Settings folders as you retain your existing folders.
Run Calibre from the flash drive as normal and the updated version will start and your existing library and settings will still be there.
Jude and Rob