Access rights problem when using WinSCP

[johnkeusch]

Let me start out by saying I am new to linux and joomla. I can do the basics in linux and can maintain the Joomla pages that were created by a former employee. I need to change the settings so that when I upload a module the directory rights are "rwxrwxr-x" or 775. My system currently defaults all module installations to "rwxr-xr-x" and the owner is www-data. I need to be able to use WinSCP and login as myself to make changes as needed. I am part of the user group for www-data, but without "group rights", I can't make the changes I need. Where do I go and set the umask value. I have tried to set umask in profile to 0002, but it doesn't work in WinSCP.
Thanks alot for your help.