Upgrade to Calibre 3.7 - David Yin's Blog

Now, Calibre is not upgraded every week. Let me have a look at the new releases.

Allow searching for books in a virtual library using a new ‘vl:’ prefix
Server: Show file sizes in the tooltips for the download buttons.
Server: Reduce the grid view minimum cover thumbnail size from 150px to 105px
Narrow layout: Fix wasted space to the left of the comments in the Book details panel

Linux: Use native file dialogs via zenity or kdialog, if available
Copy to library: Add an action to show a dialog that allows for easy selection of libraries for copy/move. Useful when there are a large number of libraries to choose from.
Server: Allow deleting a downloaded book from the “Browse all downloaded books” screen

Server: Add a new ‘custom’ mode for the book list, where you can specify exactly what metadata fields are displayed, via a template (see Preferences->Sharing over the net->Book list template)
Speed up HTML parsing by an order of magnitude, by switching from html5lib to html5-parser
Add support for touch screens to the main calibre book list. You can now flick to scroll, tap to select and double-tap to view books.
Server: Add an option to ban IP addresses if there are too many failed login attempts
calibre-debug: Change the –explode-book action to only create the exploded directory and not rebuild the file. Add a new –implode-book action to rebuild the file, separately.
Book details panel: Add Manage authors/series/tags/etc. to the menu when right clicking on the item
Kobo driver: Update for new firmware

Edit book: Allow exporting all selected files to the computer from the ‘File browser’ by right clicking and choosing ‘Export selected files’
Server: When returning to the search page, remember the last used state of the Tag browser
Template language: Allow the in_list() functions to return different values depending on what is found
Add a configurable shortcut to move the focus from Quickview to the book list

Quickview panel: Allow opening and closing the panel via the Layout button in the bottom right corner.
Book details panel: Allow right clicking on author names to search for books by the author on Amazon.
Edit book: When doing a Replace/Count all with multiple searches add a ‘Show details’ button on the result dialog that shows the individual counts for each search.
Comments editor: Add a button to easily insert separators (i.e. <hr> tags) when editing comments

Server: Allow logged in users to change their passwords by clicking the user icon in the top right corner of the home screen.
macOS: Add headless support: calibre command-line utilities can now run on macOS machines without a screen

Edit metadata dialog: Allow right clicking the Paste ISBN button to instead paste an identifier with a different prefix.
Tag browser: Add an option to control the spacing between items
Add an option in Preferences->Look & feel to show individual layout buttons in the status bar, as was the case in calibre 2.x
Edit metadata dialog: Add buttons to easily set/clear Yes/no columns
Support for RAR 5.0 format RAR and CBR files