I am trying to create a library of files which are used for PLCs ( Programmable Logic Controllers). The file name ends in .acd for these file. Right now when i Check out a file, it is not downloaded in the sharepoint drafts folder in My Documents. However the green arrow mark on the icon appears.
Currently I am working around it by checking out the file, then downloading a copy of the file, editing what i want, then discarding the checkout in the library and then uploading a newer version of the file.
I am using SharePoint Foundation 2010 and the site administrator has disabled editing with sharepoint designer, but i can request that to be enabled if required.