This can happen from time to time - double up's, accidentals etc
To get rid of those unwanted enrolment/enquiries etc files, please download the file but do not import it
The steps are as follows:
1. Download the file, this will clear it from the download list:
2. Un-tick the 'Import' option on the file, then press 'OK'
3. Click on 'Web' > 'View downloaded files' and adjust the status of the enrolment to Cancelled and you're done!