Is your windows version 32-bit or is your computer (i.e. CPU) actually 32-bit? Most computers these days are 64-bit, but this game is Java, and who knows, it still might run - because Java.
If you have a 32-bit version of windows, I would consider looking for a 64-bit version of the operating system or switching to a free operating system based on Linux. If you don't have money to buy a new computer, then getting a free operating system upgrade is likely your best bet.
If you are on an actual 32-bit computer, then you should start looking for a newer one. As far as I can tell, 32-bit computers are at least 18 years old.
@EL GATO it should install as a seperate Mazebert app called 'Beta Mazebert', so you can play the current production and the beta in parallel.
All your progress on the production server is not affected by beta. Beta is connected to the dev server, that has a snapshot copy of the production data.
El GATO, it simulates what will happen at the end of the season. At the end of the season, there is only standard. All cards, relics and xp earned during the season is added to your current standard progress.
So for me, it gave me some extra relics and then told me I have 74 card duplicates (earned in season and in standard) and a bunch more xp.
If you are missing your stuff, tap "My Wizard," then choose "log in" or something like that. It will ask for your save code, which you can get from the standard app by tapping "My Wizard," then "Ladder"