When one has issues with the KeySign Connector, try uninstalling and installing the most recent version (with deletion of older version folders).

Step-by-step guide

Go to Start > control panel > Programs > Uninstall a program.
Select KeySign connector and click Uninstall.
When this version uninstalled successfully, go to windows explorer and enable hidden items by selecting the View tab and enabling the checkbox next to Hidden Items.
Go to the following folder:
```
C:\Users\<your user>\AppData\Local\
```
Delete the entire folder called KeySignConnector.

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