You can then import these into a spreadsheet.
There is now an 'Export' button at the bottom of the Transactions tab:
When you click on that you get a file chooser where you can specify where you want the CSV file stored. There is a default set which I expect most people will use:
This produces the CSV file and puts a little confirmation message in the status bar.
When you import it into a spreadsheet it will look something like this:
(but not in Chinese ! - I was just testing the Unicode was working ok)
The current fields being exported are:
+ date of transaction
+ description
+ amount in BTC
+ amount in fiat
+ transaction id
(The two BTC values shown as 0 are correct - it's just the two decimal places default formatting which needs extending).