Help needed on synology DSM7 cant get Plex to install properly or unistall or use

[ChuckPa]

From what you’re describing – PMS refusing to claim;

There are a few things which must be working for PMS to claim:

1. The syno must be configured to use your modem/router as the Gateway.
2. The clock must be synchronized with Internet time (NTP)

Given you’re not seeing the Plex icon, let’s first take care of that.
(You’re probably not using the ‘admin’ account)

Synology FAQ - Questions, Answers, and How-To's

FAQ 34: Control Plex Media Server desktop icon visibility Server Version#: 1.32.6 + Player Version#: N/A Ability to hide Plex Media Server icon on DSM desktop At the request of many Synology users, we’ve been able to add the ability for you, the DSM admin, to control whether Plex Media Server is visible on the desktop of those users who you allow to sign into your Synology NAS. Normally, Plex Media Server is available in both the DSM Application menu and may be added to the desktop…

This was an improvement we made which went wrong.
It works for some folks but on other DSM systems, it fails miserably.
We have since withdrawn it and all normal functionality will be restored in the next PMS release.