Jennifer,
I have been working with MLO for about 5 years. 2 years ago I actually started a new file. It has built up thousands of items over that time. Up until a week or two ago it was going at lightning speed doing the usual basic things.
But last week I notice that it slowed down dramatically.
After trying a whole bunch of things, including archiving old done tasks, and starting fresh using a backup from a few days before I noticed the problem started happening, I saw some initial success followed by disappointment when MLO reverted back to slowing down and giving me the "not responding" error message.
I sent an email to MLO tech support and they were spectacularly fast in answering my question.
They asked me if I was using a lot of custom icons, and indeed I was using them for every single one of my tabs. They recommended that I remove them. I did remove the ones for the normal tabs. But I could not remove the ones for the pinned tabs because that would make them unidentifiable.
Since I did that 2 hours ago, my MLO has been operating at what I considered to be normal hyperdrive speed.
We'll see how things go the rest of the day and into the rest of the week. But so far that solution seems to have worked for me.
Eddie