The same problem occurred in beta version 2020.3.4

Hi, uninstall the beta version, then go to your Help Center profile and under "My Downloads" you will find the message "Download the latest version of WebSite X5 Pro available for you", that is the latest stable version , download that version, and install it, then be careful not to re-install the beta when it tells you there are updates available.

Regards

Thank you. I have followed the steps you said when I had the same problem before. so I did it now. However, my project is currently registered in the upper version. Even if I take the program to the previous one, I cannot open the project because the project was saved in the latest version.

is there any way to roll the project back to the previous version? Unfortunately, it is not enough just to take the program to the previous version.

Or How do automatic backups of the project open?

Don't have a previous copy of the iwzip file you exported earlier in STEP 5? When working with a new version or with a beta version (even more so!) You must always make a backup copy of the project and work only on the copy created and not on the original one, otherwise you cannot go back.

I keep backing up from step 5 at regular intervals. but while taking the last backup, I found it blank and saved it. When the version changes, I normally change the name and backup. but this time it was not like that. and I have been working for the project for days, I have no chance to do it all over again. I can't go back either. the program has its own backup. It ends with iwpz2 but the program doesn't open it either. Apart from the backups I have taken, I also use automatic backup in pro.

but right now I have no choice but to use the last one I saved. I made a lot of changes. There are too many details in the project.

Strange that you are experiencing these slowdowns on the beta version, I am also using it but I have not noticed any slowdowns. In a few days the beta version will be released as an official version ...
On your project pages, do you have empty cells or rows? DO NOT leave empty cells in the mail, you can insert objects (eg text object) and you can not insert any content inside it but the important thing is NOT to have empty cells and lines in the various pages of your project otherwise the software gets stuck with " blanks "because it can't recalculate them properly for responsive resolutions.

After finishing this project, I need to start a new project and it is at least as detailed as this project. first I have to finish this and deliver it

no blank lines but empty cells. However, this issue has not been a problem so far. I usually work with all my projects with 12 columns. sometimes there have been many projects where I left blank cells on the right and left. there was no problem.

I have never faced such an issue before this last 3.4 and 3.7 beta. I have prepared dozens of projects so far and I'm doing updates. If that's why the program freezes, crashes, and even appears to be a power-consuming application, it's ridiculous.

task manager screenshot

Ok, I'm glad your project is faster now.