I had the same thing on 14.20 and reported this to Support: after long trials, I could trace back that I had a corrupted configuration file.
- with that config, UE would simply open large files without temp files without asking (despite the default settings being used). So it would simply overwrite the file on disk without warning.
- with a new, clean config, UE would behave as described by Mofi above
I could never trace back why I had a corrupted config. I just used the various dialogs to change config settings and apparently, along the way, corrupted my config files. So there must be a hidden bug someplace.
I find it also interesting to note that IDM chooses to bring up the "Temporary file handling" dialog box if the user uses the default (Use temporary files
). This is VISTA behavior: Are you sure you want to move the mouse cursor to the left?
Support explained that they did this because they wanted to make customers aware that there are faster ways of dealing with large files, ie., with temp files disabled. So they are targeting people who haven't read the manual. As a punishment, the dialog box does not explain the consequences of opening without temp files.
As if they were concerned about performance: If one opens a file read only
, the temp file behavior is the same as if one opens a file for editing. I've yet to understand what the purpose of a temp file is in the case of read only access.