help!!

hello I have reference manager 10. I used to have reference manager 11, but i dont know how it started to say that it was just a trial. I had a database w reference manager 11. i disinstalled RM 11 and installed RM10. database can be used, but when I try to insert marked citation in word (i have already done th RM10cwyw stuff) it says “cadena de clase no válida” something like class chain not valid…can anybody help me? I am writing my thesis…

thanks a lot