I have just stored the portable version of SMathStudio_Desktop.exe on my PC (Windows 7 Home Premium 64 Bits, Quadcore CPU). From tne second start on it takes several minutes after launching the process until the GUI appears on the desktop. Used RAM as indicated by the Windows Task manager increases slowly from around 4 MB to approximately 33 MB. After opening the "Open file"-window used RAM increases gradually to 47 MB and does not decrease after closing the window without loading any file.