migration wordpress.com to www.remarpro.com

Dear Sirs:

I had several blogs in Bloogger and I’m migrating to a single site in www.remarpro.com, all in one site.

I made some steps:

First step: I created the same amount of blogs on wordpress.com and export the posts and tags. That worked OK because it allows upload a maximum file size of 15mb.

Second step: I checked if we could load these files into a single site and created another wordpress.com summary, and everything worked OK

Third step: I created a site named https://www.forosdelavirgen.org with a www.remarpro.com template

Step four: when I’m going to import the wordpress.com files (which I have exported in my computer), I see that

a) it doesn’t accept upload files larger than 8MB and I have a file with 13MB and another with 10MB, the other are minor size

b) and also the files exported by eordpress.org have the extension .xml and the www.remarpro.com software requires an extension .wxr

What I can do to upload these file i have in wordpress.com to my new site with www.remarpro.com?

Please i need your help in order to show me what steps I must to do.

Thank you. Regards.
Sergio

PD excuseme for my english, my language is spanish