This hotfix addresses a bug introduced in RAD Studio 10.2.1 and reported as RSP-18792 in Quality Portal. The issue causes an inherited VCL form to fail to scale on high DPI displays. Actually the fix resolves also a couple of related problems.
The download is available at https://cc.embarcadero.com/item/30798
Notice that even if the changes is for only a few lines of source code, the download is over 80 MB, as we are updating all binary files (DCU, BPL) including that code. The list of files is included in the download page.