You should have saved these files before upgrading/removing IceWM

. Try to see if you can find at your home directory a hidden folder called ./icewm. There should be your "menu", "keys", "toolbar", "preferences" and other files. If they are not, go into /usr/share/icewm and copy those files ("menu", "keys", "toolbar", "preferences") to your
/home/user/.icewm
Re-run Icewm and see if it works. If it did not, then you will need to write the "menu" file manually with your favorite editor. It's a bit of work, but nothing really complicated to do
