I replaced my windows 7 x32 by a x64, reinstalled impulse, and then it showed me that the old deskcapes v2.50 could not be downloaded and installed as it was not compatible with my OS.
So I purchased an upgrade to v3.2, I tried to refresh the tab Updates in Impulse, I saw the flash icon at the top right showing a loading, then the popup message "Updates are available!".
However Impulse still shows only the v2.5, even if I restart it. Any idea ?