Thanks for your help, mauron85!
I've installed it from the app manager.
Here's the result I got when I did the commands as per your post:

Nokia-N900-42-11:~# apt-get remove --purge imhere-0.3
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
imhere-0.3*
0 upgraded, 0 newly installed, 1 to remove and 1 not upgraded.
After this operation, 291kB disk space will be freed.
Do you want to continue [Y/n]? y
(Reading database ... 29123 files and directories currently installed.)
Removing imhere-0.3 ...
dpkg: error processing imhere-0.3 (--purge):
subprocess pre-removal script returned error exit status 1
Errors were encountered while processing:
imhere-0.3
E: Sub-process /usr/bin/dpkg returned an error code (1)
Nokia-N900-42-11:~#

and this is what I got for dpkg - l imhere*
~ $ dpkg -l imhere*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==============-==============-============================================
pi imhere-0.3 0.3.1-1maemo0 A customizable application, that can be cont
~ $