Some people have recently reported a problem starting Ór, in that it is not possible to do so.  It may be due to updates in Java or recent changes in orienteering.ie.

In any case, the solution is to add "https://www.orienteering.ie" to the Java exception sites list.  The FAQ at https://www.orienteering.ie/or-home/or-faq/  describes how to do this.  I suggest adding both https://orienteering.ie & https://www.orienteering.ie.

I'll update the FAQ as soon as I figure out how to.

Martin