Quote:
Originally Posted by fidvo
Can I run Calibre 3.x and 7.9 on the same library?
To give some context, I have a couple of computers running Windows 10, but I also have an old laptop with Windows 7. I haven't updated Calibre in several years because newer versions won't work with Win 7.
I keep Calibre Portable and all my libraries on an external hard drive. I would love to be able to upgrade Calibre to the latest version, but that would prevent it from running on that old laptop.
I just came up with the idea of keeping a backup copy of Calibre 3 portable in a different location, then if I need to run it on the Windows 7 laptop I would run that version. Yes, I'm okay with the fact that it won't remember the library if I point it to one not inside the Calibre 3 portable folder. This is a " just in case" situation so I don't mind having to jump through hoops to get it to work.
My main question is whether running the new Calibre will make any changes to the libraries that will prevent me from running Calibre 3 on it.
If this is a Really Bad Idea  that's fine. That old laptop is just for emergencies anyway. I'm just trying to figure out my options before I upgrade Calibre. |
Just in case what?
You should be able to access a copy of a library created/maintained on calibre 7 with calibre 3.48 - but if you change it in anyway on 3.48 you would suffer data loss if you copied in back again. If you used features added in versions 4/5/6/7 like Category Notes, the Data folder, etc etc you would not see them in 3.48.
Why don't you install
current version of calibre portable on one of your W10 systems, then use the Copy to library feature to create a subset of your existing library and see what happens of you copy that library to your Win7/calibre 3.48 laptop.
The other thing you could do for your 'just in case' scenario is to install a dual bootable Linux on that old laptop, then install the latest calibre under it.
BR