[mitch13]

Hi,
Last week I went to load Calibre Portable (which I have been running for years) and came up with an error I had never seen before. I am running on a Lenovo Idea Pad 3 using Windows 11 Home latest version and Calibre 6.29.0. Calibre on this Lenovo has had no problem for months. Not only it would not start but then I found that it had 'emptied' three of my 'sub' libraries (I have split my Calibre library into around 12 libraries based on major categories eg History, Magazines etc.
After panicking, I went to my backup for all my libraries and rebuilt them on a new 4TB portable hard drive. Calibre 6.29.0 loaded with no problem opening my main Calibre library. Where I now have the problem is getting to my other 10 'sub' libraries (which are in their usual folder with the Calibre library).
In the past to go to another library there was an option to 'quick select' a choice of any of them. I do not have this option now, only:
************************************************** ************
"Your Calibre library is currently located at D:\Calibre\Calibre Portable\Cooking Library
New location (area to enter location)
Note that putting the calibre library on a Networked drive is not safe.
1. Use a previously existing library at the chosen new location
2. Create an empty library at the new location option: copy structure from the current library
3. Move the current library to the new location
************************************************** ***********

I cannot seem to get any of these options to work.
Any suggestions to get me back to normal would be great.

I have attached the error messages that came when I tried loading my original Calibre.