I have installed Qt5 from the Qt5 project site, to the following directory
I would also like to mention that I had Qt4 installed previously, I have removed all instances of Qt4 through the software center.
Now that I issue
designer from the command prompt, the system gives the following error:
designer: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/designer': No such file or directory
What can be done to correct this problem?