ubuntu knime not starting

After a couple of month's hiatus in using knime 2.11 on ubuntu, it suddenly stopped working. Does not go beyond startup screen . Installed latest version 2.11.3, same result.

 

ubuntu 1.04 has had several updates too.

 

No bp log location saved, using default.
[000:000] Cpu: 6.58.9, x8, 3300Mhz, 7870MB
[000:000] Computer model: Not available
[000:000] Browser XEmbed support present: 1
[000:000] Browser toolkit is Gtk2.
[000:000] Using Gtk2 toolkit
[000:001] Warning(optionsfile.cc:30): Load: Could not open file, err=2
[000:001] No bp log location saved, using default.
[000:001] Cpu: 6.58.9, x8, 3300Mhz, 7870MB
[000:001] Computer model: Not available
[000:001] Browser XEmbed support present: 1
[000:001] Browser toolkit is Gtk2.
[000:001] Using Gtk2 toolkit
No bp log location saved, using default.
[000:000] Cpu: 6.58.9, x8, 3300Mhz, 7870MB
[000:000] Computer model: Not available
[000:005] Warning(optionsfile.cc:30): Load: Could not open file, err=2
[000:005] No bp log location saved, using default.
[000:006] Cpu: 6.58.9, x8, 3300Mhz, 7870MB
[000:006] Computer model: Not available

 

OK.Solved by deleting previous workspace folder!