in the upper right corner of the screen, there is the floppy disc icon, the gear(?) and the question mark, if you click the gear, there is a setting for the proxy.  here is the previous 1.4 version: www.dell.com/.../DriverFileFormats and here is the one previous to that: www.dell.com/.../DriverDetails if you click the "other versions" dropdown instead of "download file", you can also see the previous versions to that. You will need to uninstall the current version to install an older version. 
I think I've seen this error before, but when I try to create a SUU directory of R710 4.10 updates, it starts downloading them but somewhere during the download process, I get the error: SUU directory creation failed SUU dorectory creation failed with error Digital signature verification error for 'ftp://ftp.del.com/sas-hdd/FRMW_LX_R276749.BIN'   I don't recall what I did to fix this issue last year, but I did update to the newest version of Repository Manager today. Any ideas on what is going on?   Brian  
Unable to create SUU folders from Repository Manager