am i still able to switch platforms?

Yep, you sure can. The email with the survey link should be from 09/2015 if you were a backer on the original Kickstarter. The email should be titled Action Required: Survey for Bloodstained:...

Sounds like you know already, but a new one can be requested from orders@fangamer.com if you can't find your original survey link. The URL may need to be copy/pasted to work.

thank you, another quick question I can't remember which email i used, is the fangamer thing linked to the paypal email?

while you were answering the email was found but thank you very much anyway