SAP GUI 710 installed but view looks like very old version

I currently have SAP GUI 710 installed as does everyone else in my team however all my screens have always looked like it was an old gui that was installed (even the Options icon in the standard toolbar was the old 3 overlapping circles u2013 red, blue & green u2013 instead of the bar chart looking version). The details of my system suggest I have the correct GUI installed and is the same as my colleagues, nevertheless we tried re-installing the current GUI again but it didnu2019t make a difference. Is there any reason why my screen would look different (somehow changed some settings)?

Note: This has been the case for a couple of years now and despite others having a look and scratching their heads, nothing has been resolved