I totally understand. In the past, anytime you would jump more than one version ahead, it would require that you export the library as a .txt file and bring it over that way. This is essentially what we are doing with MediaShout 7. If we didn't do this, and instead tried to bring everything over (backgrounds, formatting, etc.), we found that it would create massive incompatibility issues.
I know that reformatting text and adding a background can be somewhat tedious. But, with Presets and Templates (coming soon), that should become much easier. I do apologize for the extra work involved, however.
And, for the size of the library. We do intend to improve MediaShout 7 to be able to work well with large libraries. But, even when that time comes, we would still like to see a smaller library to help with the functionality and speed of the program.
I hope this is helpful.