Chrome extension to batch download expense reports selected by search on www.expensify.com
Search for Expensify Downloader and install by the button "Add to Chrome"
Install Chrome extension in Developer Mode
Go to Chrome Settings chrome://settings, section "Advanced" => "Downloads", specify Download directory and disable option "Ask where to save each file before downloading" to avoid popups for each file.
Go to https://www.expensify.com/reports specify the filter to select reports then click on extension icon on top right corner. It will start downloading all reports selected by the filter.