• First of all it's VERY IMPORTANT to add exception to the C:\Swisslog folder in your antivirus and also allow all incoming/outgoing communications to the SwisslV5.exe in your firewall. Otherwise you may experience slowdowns, violations errors and unexpected issues.
  
• Compress your database in File / Compress database. This usually solves many performance issues.
  
• World Map: by default, map is redrawn automatically after saving or edit a QSO to reflect DXCC/Grid changes . You can disable this function by selecting the World Map then unchecking the "Update map automatically" from the Maps... menu. 
  
• Statistic Quick views: Swisslog refreshes all these views automatically after saving a QSO. This is necessary to reflect the new statistic status. If you have many of them you may add some extra time when saving. If you want to disable this function, edit the SWISSLV5.INI file and add this line in the COMMON section: SkipRefreshQuickInfo=1
  
• Realtime saving on online logbooks: although this process uses multithreading and it's very optimised, it will add some extra time because needs to get a reply from the online logbook. If you need to work fast I suggest to uncheck realtime saving in Options > Online logbooks then uncheck the "Upload QSO automatically.." option on every online logbook. At the end of your day go to Tools menu and Upload logbook on every online logbook. Swisslog will only upload pending QSOs since last time.
  
• Logbook views: by default logbook views are refreshed automatically to reflect all QSO you have just entered. You can disable this by unchecking the "Refresh view automatically" in the popup menu.
  

• Search in the Swisslog folder if file InactiveStatistics.txt exists (This file exists when you have disabled any statistic). It contains a list of all statistic ID belonging to the disabled statistic. If this file exists simply edit it with a text editor. Otherwise create a new one.
  
•  Add a line with any of these names (belonging to the information table you want to disable): LOTW, EQSL, EAQRP, LYNX or URE. This file may look like this (numbers are the ID of the disabled statistics, if any):             
  

• Socket Error messages: these error messages are disabled by default because under poor internet connections, these messages are difficulting regular logging operations. However, if you want to display these messages add this key:
  

• Automatic Quick Info refreshing:  Since version 5.99e Swisslog refreshes all Quick Info windows automatically after saving a QSO. This is necessary to reflect the new statistic status. However, in old computers this function may cause that saving a QSO takes a lot of time if you have many Quick Info windows. Add this key if you want to disable automatic Quick Info refreshing:
  

• Avoid the coordinates message dialog: The first time you enter a QSO during a Swisslog session and the QTH locator mismatch with coordinates, a dialog prompts user to select whether to adjust coordinates or QTH locator. If you want to avoid this dialog and set a default action for all cases, add one of the following keys:
  

• DX window refreshing: Since version 5.99 a fix was applied to the DX window to avoid Swisslog freezing in a high traffic scenario. Some users with old processors have experienced strange issues after this fix like blinking windows/buttons. Add this key if you want to disable this fix:
   
  SkipDXWinRefreshing=1
   
  VERY IMPORTANT: Disabling this fix will cause Swisslog freezing in a high spot traffic scenario. This can be worse than the blinking issue! Keep this in mind before applying this modification.
  

1. From the main menu select Tools ¦ Update QSO's for Callsign based Statistics
   

Quote:

1. The following dialog window is displayed:
   
   
    
   
   
2. From the list displayed, select the Statistic you want to update and press Update.
   

• if the Callbook DB or Country Table has been updated.
  
  
• if you did not have the Callbook CD available when you originally entered QSO's.
  
  
• if you changed the geographical location for one of your QTH's and you want to update the distance and the azimuth data.
  
  
• if you want to enter data not introduced when you originally entered the QSO such as Name, QTH or even the State, County or IOTA. NOTE: Keep in mind that if you update State or County maybe the current ones are not the same as the ones worked during the QSO.
  

1. Open a Logbook View by selecting View ¦ Logbook-View (either Last or Selection) from the main menu.
   
   
   
2. Now select the QSO's you would like to update – the easiest way is to click on the QSO's using the mouse – or use a combination of manual selection and the filtering capabilities in SWISSLOG. For information on manually selecting QSO's, see paragraph 2 in the section above or click here.
   
   Hint: If you need to find and select a large number of QSO's, it may be easier to use one of the many filtering or selection functions within the Logbook View, or a combination of filtering and manual selection. For complete details on the Logbook View functions click here.
   
   
   
3. Select Functions ¦ Update QSO's with Data from Country-Table and/or Callbook-CD / Internet Databases from the main menu, or right-click in the Logbook View to activate the pop-up menu. The Update QSO's dialog window will appear as shown below:
   

Quote:

1. Check the fields you would like to update.
   
   Note: SWISSLOG only updates fields which are empty unless you check the box next to – Replace existing value.
   
   
   
2. After you have marked all fields you want to update, click on – Refresh QSO's.
   
   Hint: Depending the the size of the log, the number of changes, and the speed of the computer, the update process can require a considerable amount of time, be patient.