[Gambas-user] failure on Startup of Gambas on Linux Mint Debian Edition 2

[KKing]

I've just had to set up a new unit and am using Linux Mint Debian 
Edition 2 usuing 32bit MATE,

If I install Gambas via the LMDE2 Package Manager it installs gambas 
v3.5.4-2+b1

But when i try to start Gambas from the menu, I get a window

This application has raised an unexpected error and must abort.
[13] null object
Setting.WriteWindow.385

I uninstalled (completely remove option) gambas via the Package Manager.

Then I downloaded source from gambas site for v3.8.4

installed the dependencies mentioned on the wiki for debian, plus two 
more for qt4 opengl and qt4 webkit. I still had qt5 Opengl and qt5 
webkit listed as disabled .... do I need them to use Gambas if the Qt4 
is resolved?

I couldn't see Qt5 libraries on the LMDE2 Package Manager?

If I try to start gambase from terminal, I get window.

This application has raised an unexpected error and must abort.
[20] Bad argument
Settings.WriteWindow.388

and in the terminal window there is
Project.Main.356

  - - - - - - -
Anything obvious I can try? Or what would be next debugging step to 
establish issue.