Lost My Catalog after recent update

I don't know if you will get this, but same thing just happened to me. I looked everywhere for my file to "choose the catalog" and it wasn't there... i clicked create new and now all my photos and my presets are MIA. I have been crying for an hour over this. 

This is why I'm trying to look for alternative of lightroom. I've worked fine all the years, but now, seems to get anoying this frustrating upgrade and updates of this and that. Why? Because, I m working a full event which has about 2k photos to adjust, work today, tomorrow and so on, from time time export some of edit (because I lost all i've done in 2 days for example just with this crap of upgraded catalog, where you can not solve anything. Recently I had 750 photos , about 200-300 edit yesterday, and today wanted to continue till finish them and export and "bam", your catalog will be upgraded. Now ok, but how about the time and work i've been done yesterday? Puf puf, disapear again. Can not use the main catalog where is store my work of those photos, and the upgraded catalog come fresh and new . This is happened to me twice from now, last one i lost a work of 1k photos, a week of work for this. I just can't do it anymore. I'm sorry lightroom, i'll cancel my all subscription. A simple solution was to ask for this, like hey dude, we will upgraded your catalog, click over here to save all your work and continue with the new catalog, or somehow import the one you've worked earlier. But no!!!!! This has to be whithout the option to back up your work . Let's make a save button and save every picture we edit. This windows of the upgraded catalog pop up like nowhere, and the option are exit like go away, upgrade and lost what you worked yesterday, the folder imported, and so on, or chose a diffrent catalog, but not the one you worked , the other name of a new catalog. I click choose a diffrent catalog, it appears my curent catalog, click to open it and back again at he window to upgraded catalog. Sorry adobe, I was trying to look here for an official answer at this problem but no solution worked so far. this is like a major bug not fixed, but just used more often. 

Lightroom has to upgrade your catalog to be compatible with the upgraded application. Lightroom handles this upgrade without deleting your current catalog, by making a copy that is upgraded. 

Open your current good catalog. Say yes to the message telling you it has to be upgraded. Lightroom automatically takes care of everything for you. Just be patient while the upgrade process takes place.

Lightroom is installed in your Pictures folder by  default. If you go to  your Pictures folder and open  the Lightroom folder you will see any and all of  your previous catalogs. Also by default Lightroom appends the file name with a -2.lrcat. Depending on whether or not you have periodically deleted old catalogs you will see and can check 'date last opened' to find  the most recent catalog you were working in.

Check your Backup folder in the same Lightroom directory. If you haven't cleaned that out you will also find your backups  there. If you don't  have  a  secondary auto backup to an external hard drive or cloud service you may want to relocate your backups somewhere  other than your  local drive. This way if you have to  retrieve it if you run into a problem with  your computer  it will be accessible.

Your images are NOT In the LR catlaog. They are stored on your hard drive someplace. So you have not Lost them.

But you also have Not Lost the most current catalog (that is unless YOU deleted it).

Search your drive for .lrcat and or with LR open go to the File menu item and selct Open Recent. Do you see more than one catalog listed? Make a note of them and open each one until you find the most recent one.

And by default LR creates a backup of the catlaog file weekly (that is unless you stopped that from happening). So you should have a backup catalog that is no older than 7 days. those are store by default in the folder named Backup and that folder is in the smae folder as the working catalog is stored.