I hate to say but it seems like you made up your mind.
But if you are looking for a little advice, from reasons you established, I'd stay at the current company and learn the software. The only problem is that by accepting the other company and if you were to accept the counter offer, it would 100% put a target on your back for HR and if you aren't able to cut it you are first to go.
sub1030 t1_j6a78gy wrote
Reply to Accept Counter Offer or leave? by [deleted]
I hate to say but it seems like you made up your mind.
But if you are looking for a little advice, from reasons you established, I'd stay at the current company and learn the software. The only problem is that by accepting the other company and if you were to accept the counter offer, it would 100% put a target on your back for HR and if you aren't able to cut it you are first to go.