Maritza,
If you read mine and Alan Cantor's posts in the link I sent you above, that is the correct way to capture a screen on your PC. You can do this with the current version of DPG you are using or if you upgrade to DPG 15.61. It will work with either version.
Cheers
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Tiger Feet
| DPG 15.61 | KnowBrainer 2017 | Windows 10 Professional /64 Bit | Intel® Core™ i9 Ten-Core Processor i9-10900K (3.7GHz) 20MB Cache | 32GB RAM. | 250GB SAMSUNG 970 EVO PLUS M.2, PCIe NVMe SSD (up to 3500MB/R, 2300MB/W) Boot Drive | 1TB SAMSUNG 970 EVO PLUS M.2, PCIe NVMe SSD (up to 3500MB/R, 3300MB/W) Storage Drive | Sennheiser D10 USB Wireless Microphone