Please concatenate the four parts to get the ova file for importing it in your virtualization software.
MD5 sums:
b5692913d4c9714e14d9035709816014 Grail3.45.ova
3dec244748dc0ce435e559755667c583 Grail3.45.ova.xaa
b10e22834e85c3d4be850dc4ea91d67b Grail3.45.ova.xab
d033c19974a2109f8cb9aa2da40794fa Grail3.45.ova.xac
0b13eb40cbb6abc44ccf6ee788bf413b Grail3.45.ova.xad
SHA256 sums:
58338b48781591d840a734538add0e8b387f6056e4c150ab6fc26dff7c412cf8 Grail3.45.ova
e598a65d1046a722d8fc71fc880a4d123b3ae49bb0469948e73d9320640672a5 Grail3.45.ova.xaa
63d3a8f08ceae216e1e1f4a51b2a23adb48a84669a8eb3e4919414dfcf35bbb7 Grail3.45.ova.xab
e8240f982d77aa7b23946a92fb3ed11bb7e83b4410d8dbb02142abeecbf43608 Grail3.45.ova.xac
0f7e55f9ff52d39dc3b825825ef98a9e9adfaccfee0d6ad15f2a0bef9abb07ee Grail3.45.ova.xad
SHA512 sums:
9de71249c7e1d59ed9425b3b5b5f2a270ba2ed53795c5d6217b57b4c55a45d22b08b618489f187a57ab370ce5e63bb39f42671220e8edbb9de56807b43de245f Grail3.45.ova
824235d58d4daef134f2ffce6e571efcd41edce6b0e94cc28b2eb8383d4ec9ad46e4f18ce09655495cd84b0f3401f722be3ed294181f8124cc9702749f302daa Grail3.45.ova.xaa
c8fec7892d1e93615870c955a9d850a4509d451cfdad2a005fb62ae92bd179177f24c3bff55eb4b6d0fb02cba8c3ba8d9ea53479e1c7e181eda6f3b5013f350c Grail3.45.ova.xab
77039522af9d7a7ee244c9f446da1a6e0fba4a11eb029d99afb4c623c87ef44c1f25b93b19be964e1b1da2a61aed4bea22fbab807f4932e10e42f2ce90fbedbc Grail3.45.ova.xac
38e79987aa7a1828586592e3bd1be3fe23da4d8712083e6da36454300652618c5ce8a947400d1c798f8a9c4f1d8fa1eaca36593e9a6099268fcc341c2699e318 Grail3.45.ova.xad