Sorry, please ignore this thread. It minimize is working now. Appears to have been a corrupted Windows application instance. After starting a new instance of WinSCP all is well.
Thanks
Just donwloaded and installed WinSCP Beta 430 and found while downloading set of file that the Minimize feature does not appear to work until all files have downloaded. This was not how it worked in prior version. Clicking on minimize worked immediately.
I'm on Windows XP Version 5.1 2600 Service Pack 3
Thank you for your great software.
Bob