Database Software

Quick question.... We recently installed and upgraded GI and Databases from 11.2.0.1 to 11.2.0.2 with out-of-place install. I successfully deinstalled 11.2.0.1 database sofware using ./deinstall (1st had to unset TNS_ADMIN and remove/rename *.ora files under 11.2.0.1/network/admin). Now trying to deinstall 11.2.0.1 Grid, and getting this error:

ERROR: Can't deconfigure Oracle Restart before removing or downgrading managed Oracle databases.

I found in the crsdc.log that it is finding my new 11.2.0.2 GI and setting CRS_HOME to this.
[CRSDeconfig.readPropertyValues:499] ORA_CRS_HOME = /u01/app/oracle/product/11.2.0/grid_2 (11.2.0.2)

I have all env variables unset and am running ./deinstall from the ... 11.2.0/grid/deinstall (11.2.0.1)

I'm guess that this is happening because my current 11.2.0.2 environment is up and active so it's detecing it. Do I have to have the 11.2.0.2 environment shutdown in order to deinstall the 11.2.0.1 G.I. ?
And if I'm not able to do that(i.e. shutdown the env), can I just go ahead and remove the software manually instead of running 'deinstall'.
cd /u01/app/oracle/product/11.2.0
rm -Rf grid

Thanks,
Ann