Running a query and then do 'Send to Report' which creates an .xlsx file. However, on clicking the 'Open Excel' button it only shows .xls as an extension option. Have to select 'All Files' to pick an .xlsx file.
WORKAROUND
Select 'All Files' as file type, or *.xlsx in the filename to filter the list of files to choose
STATUS
Enhancement Request ST101368 has been submitted to development for consideration in a future release of Toad for Data Analysts