If your database solution is fairly simple, you should be able to convert the files, review the Conversion.log file, test your converted files, and use them. For example, simple files that were built from the templates provided with your previous version of FileMaker Pro should convert accurately without a lot of manual corrections afterwards.
If you’re converting a multi-file relational database created with custom features such as custom scripts, or a database that’s business-critical, you should plan your conversion more carefully.
FileMaker Pro 10 can convert files created with versions 3.x, 4.x, 5.x, and 6.x. If you have files created using FileMaker Pro version 2.x or earlier, you must first convert them to one of the supported formats listed above. Then you can convert the files to FileMaker Pro 10.
When you convert files, FileMaker Pro 10 preserves the contents of your original files and creates new, converted files in FileMaker Pro 10 format. The content of the original files are not modified, and you can open them in the previous version of FileMaker Pro that created them. The converted files can be opened only in FileMaker Pro 10, FileMaker Pro 9, FileMaker Pro 8.x, and FileMaker Pro 7.