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To uninstall Axxon PSIM, do the following:
Uninstall Axxon PSIM.
Complete guide Removing Axxon PSIM™ software
If necessary, remove the registry keys from the registry section HKEY_LOCAL_MACHINE\SOFTWARE\AxxonSoft\PSIM for 32-bit systems (or HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\AxxonSoft\PSIM for 64-bit systems).
Attention!
If any registry keys in this registry section or its subsections were manually created or modified, the custom values cannot be restored after deletion. If uninstallation is performed for the subsequent installation of a new Axxon PSIM version, this step is not recommended.