When I open a file with the menu item "Open", it is very fast (Writer, Calc). If I click double on the filename in the Windows Explorer (File Manager), it takes about a minute, as not running Writer/calc, but this is already running. I clicked double on about 10 or 20 files, it took about 10 or 20 minutes, and LibreOffice used more than 1 GB of memory, naturally, this was virtual memory. Naturally, the cause is that already the whole program loaded, but required only the loading of the data (.odt or .ods file). When finished the all 10 or 20 openings, the memory freed.