You can check on the current status of the exponents which were assigned to you by going to
http://v5www.mersenne.org/ and clicking on the small black icon to the left of "Results Queries" in the column on the left of the page, and then click on "Exponent Status".
It may tell you that the exponent is assigned to "Anonymous" which, I believe, refers to a user who has not updated their client and transferred to the V5 server. This is less helpful because you won't know if you are that user or not. So even better, assuming you have successfully created your account on the V5 server, is to log in on that webpage and look at the details it gives you, maybe clicking on "Assigned by worktype", to see your own assignments.