cannot access to my projeqtor

Hi Experts!
Since today, and with no change on my computer, I cannot access to my projeqtor aymore.
Here is what I get:

SQLSTATE[HY000] [1049] Base 'projeqtor' inconnue

( ! ) Fatal error: Call to a member function query() on a non-object in C:\wamp\www\projeqtor\model\persistence\Sql.php on line 59
Call Stack
# Time Memory Function Location
1 0.0090 383608 {main}( ) ..\main.php:0
2 0.0130 755408 require_once( 'C:\wamp\www\projeqtor\tool\projeqtor.php' ) ..\main.php:10
3 0.0650 1896544 Parameter::getGlobalParameter( ) ..\projeqtor.php:53
4 0.0650 1898504 SqlElement->getSqlElementsFromCriteria( ) ..\Parameter.php:511
5 0.0660 1958208 Sql::query( ) ..\SqlElement.php:1285

Could someone help please? I've a lot of data and I do not want to lose them!
Many thanks
tazsolo

Thanks, but in the windows tray on the wamp icon, I can see the server is online and all services are started. How can I make sure mysql is running?

Hello,
Mysql server is running, I've checked that.
When I try to open the DB using the command line, I got an error message saying 'Error 1049 (42000): Unknown Database projeqtor'. Here is the command I use:
cd C:\wamp\bin\mysql\mysql5.6.17\bin
mysql --host=localhost --user=******* --password=******** projeqtor

Do you know where is located the projeqtor database in the windows directory?

Thanks to all for your kind help