Disable Tabs in Winclient

Hi,

We just did a technical upgrade from CRM 3.1 to CRM 5.0. On this upgrade the a few tabs that were made invisible have shown up after the upgrade. Where should I go to make this inactive again. Do transaction variants get reset after a upgrade. If I am right I should not create but I guess reactivate / invoke this.

Eg we have tabs like Details, Attachments, Address Date Customer Screen. I am trying to hide Address and Dates Tab. Any help would be appreicated. Also if I want to hide any particular field under these screens.

I looked in the following transactions CRMV_SSC , CRMC_MAP, SHDO

Regards

Susan