Once again I have confused CodeBlocks, and myself :-(
I am checking compilation (and build and run) with several compilers and versions.
For example I have gcc -11 and clang-13.  Codeblocks 20.03 on Ubuntu 22.04 LTS.
Normally I have had a drop-down box to the right of the run build, rebuild icons.  
It used to have the build targets, but now is blank, as is the current target field.
If i click on the dropdown I get a menu headed Select target, and Choose target and my several targets like debug_gcc-11 or debug_clang-13 are listed.  If I select one and rebuild and run, the log shows I am getting what I expect.  
But there is nothing showing in the expected target display area.
What have I done to confuse this?  And how can I restore it?
(Reinstalling Codeblocks didn't do anything.  Deleting all .cbp and workspaces worked at first but then the box and drop items disappeared again.  Can.should I delete default.conf?
Suggestions please.