You can. First record the first key normally.
Then go to the GUI. File->Advanced.
Then change the recording mode to macro. Now record the same button on your remote. Rather than getting a 'key already exists' error, you should be able to keep recording on that key. Same goes for long press.
Sorry, I just checked, I thought that was in the manual. It's going to get updated soon. I had to drop gitbook, they lost my manual, and I can't edit it. So I had to re-write it in docusaurus.
I'm really sorry, I fucked up and let you guys down. I'll do better.
Sounds like it was replaced. I heard of the 'memory' issue one other time. Waiting for a device to reproduce it. I was hoping @Brigitte still had it.