Uninstalled program will not re-install because dependencies now not met?

Ubuntu 20.04

I have used the (ancient - 2006) Catalog management software Gwhere since Ubuntu 18. Recently, on starting, it had "forgotten" the directory where my data was stored and I had to open it every time I used the software.

So I thought I would uninstall (using Synaptic package manager) and reinstall the software using the downloaded .Deb file.

However, now the package installer tells me a Dependency is not satisfied (libglib1.2) despite Synaptic telling me I have libglib2.0 installed.

Can anyone point me to how I could get Gwhere working again - like it was 20 minutes ago before I tried to fix a really minor issue with my sledghammer. I can't ask a more focused question because I don't even know where to start looking.

Thanks for any help, Neil

According to the search on repology.org this application was last available for Ubuntu 16.04 LTS.

To fix possible package errors run commands below:

sudo apt-get update
sudo apt-get install -f
sudo dpkg --configure -a
sudo apt-get upgrade
sudo apt-get autoremove

Then to reinstall GWhere you need to download it by using commands below:

cd ~/Downloads
wget -c http://archive.ubuntu.com/ubuntu/pool/universe/g/gwhere/gwhere_0.2.3.dfsg.1-4_amd64.deb

sudo apt-get install ./gwhere_0.2.3.dfsg.1-4_amd64.deb

Also you may be interested in trying Tellico or GCStar.