Viewing downloaded files too large to upload to new site

I moved from wordpress.com to wordpress.org and dutifully saved all of the H5P files I had created. They were sophisticated and ready to sell. However, I found out afterward that files over a certain size can't be saved. I have very valuable material embedded in the courses. Is there any way the limit can be temporarily increased so I can grab a record of what I did? At the moment it just buffers whilst loading and then crashes before I can view the tabs in the course presentation content type.