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Thanks for your question. I will try to help.
Unfortunately, as you have left the UK for a period of time you would not be able to apply for PR now.
This is because there is a considerable break in the time that you have been in the UK and you will be regarded as resuming exercising your treaty rights when you entered the UK again in 2014, which you have correctly interpreted as meaning that you would be eligible in 2019 for PR.
I am sorry that I could not have better news for you.
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