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Old 04-19-2023, 02:45 PM   #1
kbs24
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Can't run installed and portable at the same time

I just downloaded and installed Calibre portable version 6.2.1 onto a flash drive. My Windows 10 computer has 6.12 installed. I want to use both versions, separately. I put the flash drive into a usb port on the computer and opened the folder "Calibre Portable", then click "calibre-portable.exe". But then instead of a new instance of an empty Calibre opening, the version 6.12 opens up with all my books. I have read everything I could find online but cannot find an answer. How can I run the portable version on a stand-alone basis on my computer that has another later version already installed? Thanks for any help you can give me. Edit: I figured it out. I just had to reboot the computer.......

Edit #2: That worked okay until I closed the portable and opened the native. After that, even after closing the native local calibre, when I tried to open the portable the native local one opened instead. Sigh. Do I have to reboot the computer each time I want to switch I wonder?

Last edited by kbs24; 04-19-2023 at 04:53 PM. Reason: still not right....
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Old 04-19-2023, 05:29 PM   #2
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Only one instance of calibre.exe can be running at any one time, calibre-portable.exe is simply a wrapper around calibre.exe, viz:

Click image for larger version

Name:	Screenshot 2023-04-20 072426.jpg
Views:	180
Size:	210.0 KB
ID:	201141

You don't have to reboot, just shut down the one that's running and start the other one.

Added: Tip - I use different toolbar settings to distinguish between installed and portable, installed is minimal and no frills, portables are out of the box buttons and bows

BR

Last edited by BetterRed; 04-19-2023 at 05:38 PM.
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Old 04-19-2023, 05:33 PM   #3
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Quote:
Originally Posted by kbs24 View Post
Edit #2: That worked okay until I closed the portable and opened the native. After that, even after closing the native local calibre, when I tried to open the portable the native local one opened instead. Sigh. Do I have to reboot the computer each time I want to switch I wonder?
Works for me on Windows 10, no rebooting necessary. I don't use a flash drive. The portable is just in a different location on the same local drive.
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Old 04-19-2023, 07:52 PM   #4
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Quote:
Originally Posted by BetterRed View Post
Only one instance of calibre.exe can be running at any one time, calibre-portable.exe is simply a wrapper around calibre.exe, viz:

Attachment 201141

You don't have to reboot, just shut down the one that's running and start the other one.

Added: Tip - I use different toolbar settings to distinguish between installed and portable, installed is minimal and no frills, portables are out of the box buttons and bows

BR
Also always make sure to launch the portable version from the wrapper calibre-portable.exe. There can be unexpected behaviours otherwise.
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Old 04-19-2023, 09:07 PM   #5
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Many thanks to all of you for your replies!
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