Hi!
I've just downloaded the x32 version for windows. Just got this error when trying to change the icons theme:
Spoiler:
calibre, version 3.99.1
ERROR: Unhandled exception: <b>NameError</b>:global name 'unicode_type' is not defined
calibre 3.99.1 Portable embedded-python: True is64bit: False
Windows-10-10.0.18362-SP0 Windows ('32bit', 'WindowsPE')
32bit process running on 64bit windows
('Windows', '10', '10.0.18362')
Python 2.7.16+
Windows: ('10', '10.0.18362', 'SP0', u'Multiprocessor Free')
Interface language: None
Traceback (most recent call last):
File "site-packages\calibre\gui2\preferences\look_feel.py", line 577, in choose_icon_theme
File "site-packages\calibre\gui2\icon_theme.py", line 581, in __init__
File "site-packages\calibre\gui2\widgets2.py", line 172, in __init__
File "site-packages\calibre\gui2\icon_theme.py", line 628, in setup_ui
File "site-packages\calibre\gui2\icon_theme.py", line 616, in add_row
NameError: global name 'unicode_type' is not defined