Errors with Calibre 3.1.1

[Kaetrin]

I downloaded the latest version of Calibre today. I tried to open it and got a bunch of errors and was unable to get the program open. I "repaired" it and restarted the computer but that didn't help. I then removed it, redownloaded and tried again. I restarted again. I am still getting the same errors. Can you advise what I should try next?

thx
Kaetrin

Errors as per below:

calibre, version 3.1.1
ERROR: Startup error: There was an error during calibre startup. Parts of calibre may not function. Click Show details to learn more.

Traceback (most recent call last):
File "site-packages\calibre\gui2\main.py", line 292, in initialize_db_stage2
File "site-packages\calibre\gui2\main.py", line 232, in start_gui
File "site-packages\calibre\gui2\ui.py", line 250, in initialize
File "site-packages\calibre\gui2\layout.py", line 330, in init_main_window_mixin
File "site-packages\calibre\gui2\actions\fetch_news.py", line 32, in init_scheduler
File "site-packages\calibre\gui2\dialogs\scheduler.py", line 587, in __init__
File "site-packages\calibre\web\feeds\recipes\model.py", line 148, in __init__
File "site-packages\calibre\web\feeds\recipes\collection.py", line 103, in get_builtin_recipe_collection
File "src/lxml/lxml.etree.pyx", line 3442, in lxml.etree.parse (src\lxml\lxml.etree.c:81716)
File "src/lxml/parser.pxi", line 1811, in lxml.etree._parseDocument (src\lxml\lxml.etree.c:118635)
File "src/lxml/parser.pxi", line 1837, in lxml.etree._parseDocumentFromURL (src\lxml\lxml.etree.c:118982)
File "src/lxml/parser.pxi", line 1741, in lxml.etree._parseDocFromFile (src\lxml\lxml.etree.c:117894)
File "src/lxml/parser.pxi", line 1138, in lxml.etree._BaseParser._parseDocFromFile (src\lxml\lxml.etree.c:112440)
File "src/lxml/parser.pxi", line 595, in lxml.etree._ParserContext._handleParseResultDoc (src\lxml\lxml.etree.c:105896)
File "src/lxml/parser.pxi", line 706, in lxml.etree._handleParseResult (src\lxml\lxml.etree.c:107604)
File "src/lxml/parser.pxi", line 646, in lxml.etree._raiseParseError (src\lxml\lxml.etree.c:106750)
XMLSyntaxError: None (builtin_recipes.xml, line 0)

[kovidgoyal]

This is caused by the third party iOS Reader plugin. You can fix it by following the steps:

1. Uninstall the iOS reader plugin by opening a command prompt and typing the following in and then pressing Enter:

calibre-customize.exe --remove-plugin "iOS reader applications"

2. Then do the same for the Marvin XD plugin:

calibre-customize.exe --remove-plugin "Marvin XD"

[Kaetrin]

That worked - thx so much!