Hi alasdairs,
Happy New year and welcome to the forum!
Servoy and GIT will work nicely together.
By default Servoy will store all its files in the workspace you assigned during install, including DBI files.
GIT is just a versioning control system and it doesn’t really matter what GIT provider or client you are using.
If you are not familiar with GIT, I’d just create a free account on GitHub or Bitbucket (not sure about unfuddle having this) and start playing around with some text files.
You can use the GIT client of your choice, this could be Sourcetree (free), but there are many others like GitTower, GitKraken. You could even use command line and not use any client.
Once you know your way around, you can easily start using GIT within Servoy, Eclipse (which Servoy is based on) even has a GIT plugin, so that would be another possibility as a client.
Setup of GIT and Servoy is another step.
Personally I keep my GIT repositories in a central location on my machine.
Then I install Servoy and an empty workspace and import the repository from the central location into my workspace as a reference.
That way Servoy will use the files in the repository.
It’s also possible to use your Workspace folder as a GIT repository, but I’ll leave that explanation to one of the fellow forum users who is following that practice.
Hope this helps you start exploring