ok! got it! thank you very much.

so, there isn't any possible way to go for her settlement herself as PBS tier1 dependant. right?

ok. If that is the only option.

but why is not possible to apply 10 year ILR??

My wife’s entry clearance was on 3rd of Jan 2011 as dependant of student(me). And her second one was dependant visa as Tier1 graduate Entrepreneur on 15th of Jan 2013. Third one was same for one year extention. 4th one was dependant of Tier 1 Entrepreneur which is valid until 7th of Mar 2018. ...

hello. first of all, I'm really sorry. this isn't answer what you're looking for. I'm just doing same thing(TIER1GE-->TIER1E) right now and I need a help. please please help me.. if you see the page10 there is "are you a Tier 1(post-study-work) migrant or Tier4/other qualifiying migrant switching ...