fix install docs

docs/source/install.rst

@@ -16,15 +16,15 @@ the latest version of pwman3.
 Upgrading from version 0.5.x
 ----------------------------
 
-If you used the 0.5.x Tversion of ``pwman3`` your database is not compatible
-with the new 0.6.x version of ``pwman3``. You need to export your database
+If you used the 0.5.x version of ``pwman3`` your database is not compatible
+with the new 0.6.x and later versions of ``pwman3``. You need to export your database
 to a CSV from version 0.5.3 with::
 
     pwman> export 
 
 See ``help export`` when running pwman3 in version 0.5.3. 
 Once exported you should rename your old database, to keep a backup of it.
-Then you can install pwman3 in version 0.6.x as described above. When finished
+Then you can install pwman3 in version 0.6.x or later as described above. When finished
 you can import your passwords from the CSV to a new database with::
 
     $ pwman3 -i path_to_your_file.csv