There are installers for all supported Delphi versions, take your pick:
- GXRS10.4_1.3.16_experimental-twm_2020-05-27.exe
Note: You need an updated DLL for Delphi 10.4.1 - GXRS10.3_1.3.16_experimental-twm_2020-05-27.exe
 - GXRS10.2_1.3.16_experimental-twm_2020-05-27.exe
 - GXRS10.1_1.3.16_experimental-twm_2020-05-27.exe
 - GXRS10_1.3.16_experimental-twm_2020-05-27.exe
 - GXRSXE8_1.3.16_experimental-twm_2020-05-27.exe
 - GXRSXE7_1.3.16_experimental-twm_2020-05-27.exe
 - GXRSXE6_1.3.16_experimental-twm_2020-05-27.exe
 - GXRSXE5_1.3.16_experimental-twm_2020-05-27.exe
 - GXRSXE4_1.3.16_experimental-twm_2020-05-27.exe
 - GXRSXE3_1.3.16_experimental-twm_2020-05-27.exe
 - GXRSXE2_1.3.16_experimental-twm_2020-05-27.exe
 - GXRSXE1_1.3.16_experimental-twm_2020-05-27.exe
 - GXRS2010_1.3.16_experimental-twm_2020-05-27.exe
 - GXRS2009_1.3.16_experimental-twm_2020-05-27.exe
 - GXDelphi2007_1.3.16_experimental-twm_2020-05-27.exe
 - GXBDS2006_1.3.16_experimental-twm_2020-05-27.exe
 - GXDelphi2005_1.3.16_experimental-twm_2020-05-27.exe
 - GXD7_1.3.16_experimental-twm_2020-05-27.exe
 - GXD6_1.3.16_experimental-twm_2020-05-27.exe
 
The new version contains lots of bugfixes and a few new features.