Initializing help system before first use

# New Functionality and Changes Introduced with Decision Optimizer 8.6.1

This is a maintenance release, with resolution of some defects.

For users already on DO 8.6.x, there is no need to upgrade Xpress (8.14) or Xpress Insight (4.59).

## Defect Remediation

Resolved an issue that prevents using and generating trees with empty levels.

Parent Topic Updates from Previous Versions and Known Issues

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