I guess one could classify either as a bug or as a request for improvement, this happens on windows 0.86u1

download the same file (must have the same name) from two different services
service A completes the download successfully; the file is in your download folder including file.txt description
service B is still downloading, you can see file.*.part in the download folder
now cancel download B; FRD deletes B's part file file and A's downloaded file (A's file.txt is left over).

Request/fix: don't delete A's file when service B is cancelled. Thank you.