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Missing platform data in XDCTools 3.21.0.46

I'm developing a DSP BIOS 5.4x application that is based on ti.platforms.evm3530.  I recently did a general update on the tools that included updating to XDCTools 3.21.0.46.

Since the update, I get a build error implying that  the compiler can't read the first line of the .tcf file, which is a reference to ti.platforms.evm3530.  When I try to open the tconf file, I receive the following:  Error: Can't find Platform.tc[ip] file for 'ti.platforms.evm3530'

I examined the directory C:\Program Files\Texas Instruments\xdctools_3_21_00_46_eng\packages\xdc\platform\package and it appears to only contain MSP430 platform data.  I tried repplacing XDCTools with an earlier version by selecting Help->Software updates->Manage Configuration ,but the tool didn't offer any replacement options or updates.

How do I install the rest of the platform data in XDCTools 3.21.00.46 or roll it back to an earlier version?

Thanks'

Bob