If the lids on some of your jars won't seal, store them in your refrigerator and consume within several weeks.
If, on the other hand, you will notice that the lids on the jars that you have already stored for some time are swollen, you can boil them for 10-20 minutes before consuming or throw them away.
If you choose to boil your varenye again, keep in mind, that in this case it will loose the intensity of colour and flavour.