After more than half a year, here's another release:

• Add support for Calibre 4.X / Python 2
• Add support for Calibre 6.X / QT 6
• Include custom fork of oscrypto until my PR is merged; this fixes Linux distributions with OpenSSL 3 like Ubuntu 22.04 and Fedora 36. Fixes #20 and #23
• Allow authorizing an eReader through USB (experimental) by clicking on the "Authorize eReader over USB" button in the plugin settings
• Ignore fatal HTTP errors and/or missing or broken servers during fulfillment notifications marked as optional, fixes #19
• Drop dependencies python-cryptography, python-rsa and python-pyasn1
• Change the way the WINE executables for Linux are included to prevent false alarms from Antivirus software, fixes #13
• Fix broken notification URLs where no protocol is included (assuming "http"), fixes #22
• Fix loan data for book loans without deviceID, fixes #25
• Fix nonce calculations (yet again), fixes #27
• Merge #26 to make importing an existing authorization through WINE more reliable