When the Banana Accounting program is being installed, the "Associate Banana Accounting 7.0 with the AC2 file extension" option is activated by default; as a result all the accoutning files are being opened with the new version.
If, when clicking directly on the file before opening the program, it should occur that the file gets opened with the preceding version, this problem can be solved in the following way:
- click with the right mouse key on the file icon
- Select "Open with" on the dialog window that appears
- Choose the Banana program, the latest installed version.