How can I deactivate the products (modules) in order not to lose the available activations? (only for users with version 1.5.8)
You can deactivate the module directly from the Module Manager in DCS World, by clicking on the DRM button.
The number of deactivations is limited to ten attempts.
How to manually deactivate the product:
Run the <product name>_protect.exe file, which is located in associated
product folder into DCS World\Mods\aircraft or terrain or tech folder\bin\.
Select the deactivate application command as displayed in the
window, then press the Next button.
Press the Deactivate link in the displayed window (the Serial Number used to
Activate the application is indicated in this window by default).
After pressing the deactivate link a window requesting deactivation
confirmation is displayed.
Press the Deactivate button; the following message is then displayed.
Press Yes button to begin the deactivation process.
Confirm the application deactivation with the OK button.
The Automatic Deactivation is now complete.
The same you can find in the guide:
In case of old Black Shark 1:
To deactivate the Black Shark run protect.exe from \bin\x86\stable folder in your Black Shark installation, select "Activate or deactivate application", press next, in the next dialogue hit the blue Deactivate link and confirm your decision.
You have an error with Campaign - "Warning : This mission requires activation"
You can try to solve this error ...
1. If you are using user mods Reshade/SweetFX, please remove it.
2. Some antivirus can interfere with activation of modules, please disable it.
3. Comodo Firewall can be incompatible with some DCS campaigns.
Disable firewall may not be enough, you have to uninstall it completely.
4. If you already tried all these hints and it didn't help, write us a support ticket