Withdrawing support is meaningless, in this context.
It does not mean that it will cease to function. It is a freestanding, and relatively simple, program with the one and only task of fetching your Email from your providers.
Lack of support was withdrawn, essentially, a couple of years ago. It merely means that you will not have any security updates (I never have had such), and on line help is nor provided.
I am still using it, previously, and throughout this thread, without the slightest problem.