Thanks for your reply John.
I found a setting that is better for me.
When in Routes, to the right of the Sort By Box is a downward pointing chrevron button. It is a Content List Resizer!
Clicking this fills the page with the route content thumbnails, but the names are still truncated.
So instead of using the slider to find a route, it's just a click away now.
But, yet again, the setting reverts to default on restarting the sim.
Not perfect, but it's a workaround.
I have got the $70 purchased version without any subscriptions (purchased 19th Dec) and I am very pleased so far.
I do have one or two things that I don't like, but they are not a deal breaker.
My old dad used to say..
If all else fails, read the instructions