Uninstall from Magento 2
SSH to yours project root directory. Run cmd:
If installed via composer
php bin/magento module:uninstall Develodesign_Easymanage
If installed by coping
php bin/magento module:disable Develodesign_Easymanage
Remove all source from app/code/Develodesign folder

Uninstall from spreadsheet
Click on logout link in sidebar menu. !important all Easymanage app data will be cleared. Remove addon from Add-ons -> Manage add-ons