After Effects should open projects from earlier versions going back several years. You'll get a warning and then the project will open. You then save it under a new name. There is no current build of AE that should not open a 13.2 file.
If your version is earlier than 13.2, say CS6 for example, then you'll have to open it in the version that was used to create it and then do a save as and move back one version. This will require you to have access to all builds later than your current version.
If that does not solve your problem then we need system and workflow details along with your OS and AE version down to the last decimal point.