Fix error of cfg_util

[teddychao]

Fixes a user-reported issue.

Changes proposed in this pull request:

• Update the required path for PsPM starting up.

[teddychao]

Tested working well on macOS

When PsPM started up, it uses the defined path

When PsPM quits, the original path is restored

[teddychao]

Windows version works. The issue reported is related to the use of pspm_help.

[teddychao]

Tested it works if I added a SPM folder in the path

After running PsPM

SPM folder restored