1) STOP MySMSCore service
 1') Make a copy of your SMS.mdb (for later use) who is in :  C:\Program Files\MySMS Manager\Files (just in case or failure only) !

This is only an update procedure and no data will be lost

 2) Download last version on :

 3) Install this downloaded new version (MySMSCore.exe) and choose "REMOVE" till "FINISH"

 4) RE INSTALL MySMSCore.exe till "FINISH"

 5) Start MySMS Manager (and check your old parameters) 

 NOTE : in the "ADMINISTRATION MENU" follows instructions on the concerned page in the new manual version.