Scenario
You are about to filter the list of key-value  pairs or select a key  prior to import/export.

To filter the current list:
The key-value  database has been inspected and each key  count is displayed as a red list item:
(a) Press the first red item (*ALL*) to exit filtering and produce the full list.
(b) Press any other red item to paste its value into the 'generically specify it' text block. The screen will scroll to the footer where you may 'filter other content' or directly press 'GO'.
Note: The wildcard character (%) can be used if desired. For example, a value of id% would list all values for id0 and id1.

Filtering other content
In addition to specifying key  (or not specifying it at all) you may manually construct further criteria using the drop-down spinners and comparator value as follows;
(a) Choose AND/OR as appropriate. (This selection is ignored when key  is not also used in the filter.)
(b) Choose a column name from the spinner.
(c) Choose an operator.
(d) Type in the value for comparison ('comparator').

Tip: The filtering criteria used for the last search is remembered. The 'magnifying glass' in the action bar now has the meaning 'Edit previous filter'. Press it to bring back your last search for re-editing.

Examples
(a) kv_flag0 = 1
[List all items defined as defaults for their class]
(b) value_S1 LIKE flag%
[Items with 'S1' value starting 'flag', 'Flag' etc]
(c) desc LIKE #%
[Items having a description starting "#'

The LIKE operator
When the LIKE operator is selected the comparator is inspected for the wildcard character (%). If found it is used as is. Otherwise, it is enclosed with a leading and trailing wildcard.
LIKE comparisons are case-insensitive.

To begin key-value import/export:
Use the action bar icon to start the importation and exportation dialogs.
Before you do this you must select the key (class) to be used. Do this by selecting a red list item or manually typing the key into the 'generically specify it' text block.
If you a planning to import one of the sample files, you should first check the Expose sample .kv files preference using 'Settings' (available from the main screen).