Generally speaking the answer it yes a Virtual Machine created in a previous version of VMware Fusion will work in a later version of VMware Fusion. One issue that comes to mind is the UNC Path for VMware Shared Folders changed along the way, forget which version, however uninstalling/reinstalling VMware Tools in the Guest OS should resolve this particular issue.
If you're having a specific problem then more details are needed along with stating some additional details and to assist in that... To help figure out what is what, the best way to provide comprehensive diagnostic information is to use the "Collect Support Information" command from the VMware Fusion (menu bar)> Help > Collect Support Information and then attach the .tgz file it created on your Desktop to a reply post.