RMDLX can process srtm files which have the .zip extension. That lets you keep more files in your SRTM directory.
I have a directory on my system which is c:\srtm and I store all my files in there.
There is a setting in RMDLX which tells RMDLX to download and save a copy of the SRTM files as you use them:
Under "OPTIONS"->"Internet"->"SRTM" You will find a place to enter the directory to store your SRTM data and check buttons about whether to save copies of downloaded SRTM.
See attached image for the exact setup of my SRTM options.--
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