Just export the file list it should still keep progress as well if you copy the idm download folder to a new location. The cache folder where downloads are still ongoing can all be stopped and copied although if one file is stopped by the server it might request a new address.
Data Hoarder
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i have no ongoing downloads and just failed downloads i am too lazy to redownload and not in a hurry to use (but they may be useful to me later)
so to confirm, i should just use
"tasks->export -> export IDM files, all"
and all failed and successful downloads will be recorded into that file? reading it using a txt editor it seems to look like this
"
<
https:/....../filename
referer: https://.....
User-Agent: Mozilla xxx (Windows xxx; Win64; x64; rv xxx) Gecko/xxxx
Firefox/xxx
>
"