Quote:
Originally Posted by DNSB
It is possible to change a Calibre Portable 32 bit install to a 64 bit install. This does require extracting files from a calibre-x64 msi and copying the calibre folder into the Calibre folder in the portable install.
Doing a step by step procedure
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Thank you so much for your perfect, detailed procedure. I now have a 64b portable Calibre. I did manage to convert all of the 15 books irreducible with the 32b version, but not without pain: though 2/3 or the books transferred (one by one of course) with decent delays, mostly under 10 minutes, the rest took painfully long - 47, 53 and 38 minutes for the worst. I had first modified Calibre parameters one task at a time and didn't do anything else on that computer meanwhile.