Spring RTS Engine

get a bubble that says "please close program now and more your springdownloader.exe to spring folder and delete springdownloaderconfig.xml in your spring"

the dowloader error log shows this:

2/13/2009 3:01 AM
FATAL: System.ApplicationException: Unable to load UnitSync.dll from spring ---> System.Exception: unitsync.dll init failed
at SpringLib.UnitSync..ctor(String path)
at SpringDownloader.MapDownloader.TorrentManager..ctor(String springPath)
--- End of inner exception stack trace ---
at SpringDownloader.MapDownloader.TorrentManager..ctor(String springPath)
at SpringDownloader.Program.Main(String[] args)

You've launched too many copies of SpringDownloader. It is launched by TASClient on start (you can turn it off via settings). Also refer to http://trac.caspring.org/wiki/SpringDownloaderFaq
Check if you have MS .NET Framework v2.0. Also it could be unitsync.dll init error. Attach here a unitsync.log file (it is in the Spring root folder).

This started happening to me yesterday after months of trouble-free springdownloader operation. (Same 4 alert messages regarding unitsync, even though the file is plainly in the Spring Folder,along with the Springdownloader.exe as it should be).
Never changed any settings , it just started happening.
Have tried compatibility mode but no joy
(Running 32 bit Vista Home premium SP1).
Anyone have any other ideas as to why it would just crash out for no reason?