Exception when using the License Manager (fixed from V3.20)

Corrected from:
PLC Designer V3.20
 
Response of the new version:
No exception occurs anymore if the <Back> button is clicked in the 'Install Licenses' dialog.
 
What happens?
When using the license manager, an "Unhandled Exception" occurs.
 
When does this behaviour occur?
When installing a license via the License Manager (menu command 'Tools > License Manager > Install Licenses'), an exception occurs if the <Back> button is clicked in the 'Install Licenses' dialog.
 
Which products are affected?
PLC Designer V3.18 and higher
 
Short-term measures:
Short-term measures:
Save your project before installing a license in the License Manager.
Do not use the <Back> button in the 'Install Licenses' dialog.
 
Evaluation/recommendations:
The installation of licenses with the License Manager is possible. However, if the exception described above occurs by using the <Back> button, the PLC Designer terminates and data that has not yet been saved is lost.
 
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URL for linking this AKB article: /en-de/go/akb/201900094/1/
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