Originally Posted by robin58
I find the 64bit a bunch faster.
The only thing I discovered is that when prompted to update to the latest 0.9.9 version it took me to the 32bit download.
Of course I didn't notice this until all of a sudden I was back to 2 versions of calibre. And no the irony of someone not bothering to read when it involves a program designed for people who read is not lost on me :-)
The 'Get Update' will try and update the current running version.
When I start from 'portable', that is the update I see.
When I start from 32bit, yup! 32bit.
There may be reasons you are NOT wanting to run a different system version.