Paragon partitioner not so good combination with Linux

On my laptop with dual-boot I used Paragon Harddisk Manager to rearrange the partitions of my OpenSuSE Linux install. I shrinked the Windows partition to the smallest possible size and wanted to move the extended partition to a lower position and resize the home partition of Linux to the maximum available size. Somehow Paragon Partition Manager ruined the entire filesystem.
First, when moving the root partition it messed up the filesystem with the /etc directory being entirely wiped. Besides that it somehow added a hidden partition confusing the bootloader which resulted in a Grub error 15.
Using a OpenSuSE Live CD I got it al working again, reinstalling OpenSuSE and mounting the then unharmed /home partition. Later I tried resizing the /home partition to it's maximum size. The Linux tools somehow didn't let me resize it, so once again I tried Paragon. It shouldn't be risky because growing a filesystem avoids the need of moving data. In fact, Paragon only needed to resize the partition because I could use the native Linux tools to grow the filesystem later. Unfortunately it did rebuild the filesystem and apparently the software doesn't know about ext4 and thinks it is a ext3 filesystem.
After trying to run fsck which aborted with a memory allocation error I removed the /home partition and created a new one. Which, once again confused the bootloader, resulting again in an error 15. Which I couldn't manage to repair.
So, now I have wiped everything and started with an entire new install.
You might say: you should have made a backup. But if I have a backup of al my data, what do I need a partition tool for then? Having a backup it's much easier en saver to delete the partition, create new ones and put the backup on it.