Could well be but I will talk you through it.
Have a look for the right spanner or socket set (probably 10/13 mm)
Immediately undo bolt
Make sure you remove wiper
Put new wiper on making sure you lay it flat where you want it to lay when at rest, then tighten bolt
Thanks mate. I seem to remember reading on here somewhere that they can be a bit of a bugger to get off and that you have to pull REALLY hard

Do you concur Sir?